From 864b22d3ce3b2f7d90dd3ab28ab986b37bd3380d Mon Sep 17 00:00:00 2001
From: Dmitry Stefantsov <dmitryas@google.com>
Date: Thu, 28 Mar 2019 12:30:41 +0000
Subject: [PATCH] [cfe] Add inference and type checks to if-elements in maps

Change-Id: I3cacaee173320dd52bead6688fac24e4e4a01f0f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/97962
Reviewed-by: Kevin Millikin <kmillikin@google.com>
---
 .../src/fasta/kernel/inference_visitor.dart   |  271 +--
 .../control_flow_collection_inference.dart    |   30 +-
 ...ow_collection_inference.dart.legacy.expect |  829 +++++----
 ...n_inference.dart.legacy.transformed.expect |  829 +++++----
 ...w_collection_inference.dart.outline.expect |    2 +-
 ...ow_collection_inference.dart.strong.expect | 1507 ++++++++++-------
 ...n_inference.dart.strong.transformed.expect | 1507 ++++++++++-------
 ...ction_inference.dart.type_promotion.expect |  132 +-
 tests/co19_2/co19_2-kernel.status             |   26 -
 tests/language_2/language_2_kernel.status     |    2 -
 10 files changed, 3025 insertions(+), 2110 deletions(-)

diff --git a/pkg/front_end/lib/src/fasta/kernel/inference_visitor.dart b/pkg/front_end/lib/src/fasta/kernel/inference_visitor.dart
index 4f075c40a16b..b30b5a413921 100644
--- a/pkg/front_end/lib/src/fasta/kernel/inference_visitor.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/inference_visitor.dart
@@ -959,6 +959,8 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
     }
   }
 
+  // Note that inferMapEntry adds exactly two elements to actualTypes -- the
+  // actual types of the key and the value.
   DartType inferMapEntry(
       MapEntry entry,
       int index,
@@ -968,29 +970,28 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
       List<DartType> spreadTypes,
       List<DartType> actualTypes,
       bool inferenceNeeded,
-      bool typeChecksNeeded,
-      {bool nested: false}) {
+      bool typeChecksNeeded) {
     if (entry is SpreadMapEntry) {
       DartType spreadType = inferrer.inferExpression(
           entry.expression, spreadContext, inferenceNeeded || typeChecksNeeded,
           isVoidAllowed: true);
-      if (!nested) {
-        if (typeChecksNeeded) {
-          spreadTypes[index] = spreadType;
-        }
-        // Use 'dynamic' for error recovery.
-        int length = actualTypes.length;
-        actualTypes.add(const DynamicType());
-        actualTypes.add(const DynamicType());
-        storeSpreadMapEntryElementTypes(
-            spreadType, entry.isNullAware, actualTypes, length);
+      if (typeChecksNeeded) {
+        spreadTypes[index] = spreadType;
       }
+      // Use 'dynamic' for error recovery.
+      int length = actualTypes.length;
+      actualTypes.add(const DynamicType());
+      actualTypes.add(const DynamicType());
+      storeSpreadMapEntryElementTypes(
+          spreadType, entry.isNullAware, actualTypes, length);
       return spreadType;
     } else if (entry is IfMapEntry) {
-      // TODO(kmillikin): Implement inference rules for if map entries.
       inferrer.inferExpression(entry.condition,
           inferrer.coreTypes.boolClass.rawType, typeChecksNeeded,
           isVoidAllowed: false);
+      // Note that this recursive invocation of inferMapEntry will add two types
+      // to actualTypes; they are the actual types of the current invocation if
+      // the 'else' branch is empty.
       inferMapEntry(
           entry.then,
           index,
@@ -1000,9 +1001,12 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
           spreadTypes,
           actualTypes,
           inferenceNeeded,
-          typeChecksNeeded,
-          nested: true);
+          typeChecksNeeded);
       if (entry.otherwise != null) {
+        // We need to modify the actual types added in the recursive call to
+        // inferMapEntry.
+        DartType actualValueType = actualTypes.removeLast();
+        DartType actualKeyType = actualTypes.removeLast();
         inferMapEntry(
             entry.otherwise,
             index,
@@ -1012,12 +1016,12 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
             spreadTypes,
             actualTypes,
             inferenceNeeded,
-            typeChecksNeeded,
-            nested: true);
-      }
-      if (!nested) {
-        actualTypes.add(const DynamicType());
-        actualTypes.add(const DynamicType());
+            typeChecksNeeded);
+        int length = actualTypes.length;
+        actualTypes[length - 2] = inferrer.typeSchemaEnvironment
+            .getStandardUpperBound(actualKeyType, actualTypes[length - 2]);
+        actualTypes[length - 1] = inferrer.typeSchemaEnvironment
+            .getStandardUpperBound(actualValueType, actualTypes[length - 1]);
       }
       return null;
     } else if (entry is ForMapEntry) {
@@ -1041,6 +1045,7 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
             inferenceNeeded || typeChecksNeeded,
             isVoidAllowed: true);
       }
+      // Actual types are added by the recursive call.
       inferMapEntry(
           entry.body,
           index,
@@ -1050,12 +1055,7 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
           spreadTypes,
           actualTypes,
           inferenceNeeded,
-          typeChecksNeeded,
-          nested: true);
-      if (!nested) {
-        actualTypes.add(const DynamicType());
-        actualTypes.add(const DynamicType());
-      }
+          typeChecksNeeded);
       return null;
     } else if (entry is ForInMapEntry) {
       // TODO(kmillikin): Implement inference rules for for-in map entries.
@@ -1068,6 +1068,7 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
             inferenceNeeded || typeChecksNeeded,
             isVoidAllowed: true);
       }
+      // Actual types are added by the recursive call.
       inferMapEntry(
           entry.body,
           index,
@@ -1077,12 +1078,7 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
           spreadTypes,
           actualTypes,
           inferenceNeeded,
-          typeChecksNeeded,
-          nested: true);
-      if (!nested) {
-        actualTypes.add(const DynamicType());
-        actualTypes.add(const DynamicType());
-      }
+          typeChecksNeeded);
       return null;
     } else {
       Expression key = entry.key;
@@ -1090,14 +1086,123 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
       Expression value = entry.value;
       inferrer.inferExpression(value, inferredValueType, true,
           isVoidAllowed: true);
-      if (!nested) {
-        actualTypes.add(getInferredType(key, inferrer));
-        actualTypes.add(getInferredType(value, inferrer));
-      }
+      actualTypes.add(getInferredType(key, inferrer));
+      actualTypes.add(getInferredType(value, inferrer));
       return null;
     }
   }
 
+  void checkMapEntry(
+      MapEntry entry,
+      TreeNode parent,
+      Expression cachedKey,
+      Expression cachedValue,
+      DartType keyType,
+      DartType valueType,
+      DartType actualKeyType,
+      DartType actualValueType,
+      DartType spreadMapEntryType) {
+    List<DartType> spreadMapEntryElementTypes = new List<DartType>(2);
+    if (entry is SpreadMapEntry) {
+      spreadMapEntryElementTypes[0] = spreadMapEntryElementTypes[1] = null;
+      storeSpreadMapEntryElementTypes(
+          spreadMapEntryType, entry.isNullAware, spreadMapEntryElementTypes, 0);
+      if (spreadMapEntryElementTypes[0] == null) {
+        if (spreadMapEntryType is InterfaceType &&
+            spreadMapEntryType.classNode == inferrer.coreTypes.nullClass &&
+            !entry.isNullAware) {
+          parent.replaceChild(
+              entry,
+              new MapEntry(
+                  inferrer.helper.desugarSyntheticExpression(inferrer.helper
+                      .buildProblem(messageNonNullAwareSpreadIsNull,
+                          entry.expression.fileOffset, 1)),
+                  new NullLiteral()));
+        } else {
+          parent.replaceChild(
+              entry,
+              new MapEntry(
+                  inferrer.helper.desugarSyntheticExpression(inferrer.helper
+                      .buildProblem(
+                          templateSpreadMapEntryTypeMismatch
+                              .withArguments(spreadMapEntryType),
+                          entry.expression.fileOffset,
+                          1)),
+                  new NullLiteral()));
+        }
+      } else if (spreadMapEntryType is DynamicType) {
+        inferrer.ensureAssignable(inferrer.coreTypes.mapClass.rawType,
+            spreadMapEntryType, entry.expression, entry.expression.fileOffset);
+      } else if (spreadMapEntryType is InterfaceType) {
+        Expression keyError;
+        Expression valueError;
+        if (!inferrer.isAssignable(keyType, spreadMapEntryElementTypes[0])) {
+          keyError = inferrer.helper.desugarSyntheticExpression(inferrer.helper
+              .buildProblem(
+                  templateSpreadMapEntryElementKeyTypeMismatch.withArguments(
+                      spreadMapEntryElementTypes[0], keyType),
+                  entry.expression.fileOffset,
+                  1));
+        }
+        if (!inferrer.isAssignable(valueType, spreadMapEntryElementTypes[1])) {
+          valueError = inferrer.helper.desugarSyntheticExpression(
+              inferrer.helper.buildProblem(
+                  templateSpreadMapEntryElementValueTypeMismatch.withArguments(
+                      spreadMapEntryElementTypes[1], valueType),
+                  entry.expression.fileOffset,
+                  1));
+        }
+        if (keyError != null || valueError != null) {
+          keyError ??= new NullLiteral();
+          valueError ??= new NullLiteral();
+          parent.replaceChild(entry, new MapEntry(keyError, valueError));
+        }
+      }
+    } else if (entry is IfMapEntry) {
+      Expression keyError;
+      Expression valueError;
+      int offset =
+          entry.otherwise == null ? entry.then.fileOffset : entry.fileOffset;
+      if (!inferrer.isAssignable(keyType, actualKeyType)) {
+        keyError = inferrer.helper.desugarSyntheticExpression(inferrer.helper
+            .buildProblem(
+                templateInvalidAssignment.withArguments(actualKeyType, keyType),
+                offset,
+                1));
+      }
+      if (!inferrer.isAssignable(valueType, actualValueType)) {
+        valueError = inferrer.helper.desugarSyntheticExpression(inferrer.helper
+            .buildProblem(
+                templateInvalidAssignment.withArguments(
+                    actualValueType, valueType),
+                offset,
+                1));
+      }
+      if (keyError != null || valueError != null) {
+        keyError ??= new NullLiteral();
+        valueError ??= new NullLiteral();
+        parent.replaceChild(entry, new MapEntry(keyError, valueError));
+      } else {
+        checkMapEntry(entry.then, entry, cachedKey, cachedValue, keyType,
+            valueType, actualKeyType, actualValueType, spreadMapEntryType);
+        if (entry.otherwise != null) {
+          checkMapEntry(entry.otherwise, entry, cachedKey, cachedValue, keyType,
+              valueType, actualKeyType, actualValueType, spreadMapEntryType);
+        }
+      }
+    } else {
+      if (cachedKey != null) {
+        inferrer.ensureAssignable(
+            keyType, actualKeyType, cachedKey, cachedKey.fileOffset,
+            isVoidAllowed: keyType is VoidType);
+
+        inferrer.ensureAssignable(
+            valueType, actualValueType, cachedValue, cachedValue.fileOffset,
+            isVoidAllowed: valueType is VoidType);
+      }
+    }
+  }
+
   void visitMapLiteralJudgment(MapLiteralJudgment node, DartType typeContext) {
     var mapClass = inferrer.coreTypes.mapClass;
     var mapType = mapClass.thisType;
@@ -1188,8 +1293,7 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
             spreadMapEntryTypes,
             actualTypes,
             inferenceNeeded,
-            typeChecksNeeded,
-            nested: false);
+            typeChecksNeeded);
         if (entry is SpreadMapEntry) {
           bool isMap = inferrer.typeSchemaEnvironment
               .isSubtypeOf(spreadType, inferrer.coreTypes.mapClass.rawType);
@@ -1283,85 +1387,16 @@ class InferenceVisitor extends BodyVisitor1<void, DartType> {
     }
     if (typeChecksNeeded) {
       for (int i = 0; i < node.entries.length; ++i) {
-        MapEntry entry = node.entries[i];
-        List<DartType> spreadMapEntryElementTypes = new List<DartType>(2);
-        if (entry is SpreadMapEntry) {
-          DartType spreadMapEntryType = spreadMapEntryTypes[i];
-          spreadMapEntryElementTypes[0] = spreadMapEntryElementTypes[1] = null;
-          storeSpreadMapEntryElementTypes(spreadMapEntryType, entry.isNullAware,
-              spreadMapEntryElementTypes, 0);
-          if (spreadMapEntryElementTypes[0] == null) {
-            if (spreadMapEntryType is InterfaceType &&
-                spreadMapEntryType.classNode == inferrer.coreTypes.nullClass &&
-                !entry.isNullAware) {
-              node.replaceChild(
-                  node.entries[i],
-                  new MapEntry(
-                      inferrer.helper.desugarSyntheticExpression(inferrer.helper
-                          .buildProblem(messageNonNullAwareSpreadIsNull,
-                              entry.expression.fileOffset, 1)),
-                      new NullLiteral()));
-            } else {
-              node.replaceChild(
-                  node.entries[i],
-                  new MapEntry(
-                      inferrer.helper.desugarSyntheticExpression(inferrer.helper
-                          .buildProblem(
-                              templateSpreadMapEntryTypeMismatch
-                                  .withArguments(spreadMapEntryType),
-                              entry.expression.fileOffset,
-                              1)),
-                      new NullLiteral()));
-            }
-          } else if (spreadMapEntryType is DynamicType) {
-            inferrer.ensureAssignable(
-                inferrer.coreTypes.mapClass.rawType,
-                spreadMapEntryType,
-                entry.expression,
-                entry.expression.fileOffset);
-          } else if (spreadMapEntryType is InterfaceType) {
-            Expression keyError;
-            Expression valueError;
-            if (!inferrer.isAssignable(
-                node.keyType, spreadMapEntryElementTypes[0])) {
-              keyError = inferrer.helper.desugarSyntheticExpression(
-                  inferrer.helper.buildProblem(
-                      templateSpreadMapEntryElementKeyTypeMismatch
-                          .withArguments(
-                              spreadMapEntryElementTypes[0], node.keyType),
-                      entry.expression.fileOffset,
-                      1));
-            }
-            if (!inferrer.isAssignable(
-                node.valueType, spreadMapEntryElementTypes[1])) {
-              valueError = inferrer.helper.desugarSyntheticExpression(
-                  inferrer.helper.buildProblem(
-                      templateSpreadMapEntryElementValueTypeMismatch
-                          .withArguments(
-                              spreadMapEntryElementTypes[1], node.valueType),
-                      entry.expression.fileOffset,
-                      1));
-            }
-            if (keyError != null || valueError != null) {
-              keyError ??= new NullLiteral();
-              valueError ??= new NullLiteral();
-              node.replaceChild(
-                  node.entries[i], new MapEntry(keyError, valueError));
-            }
-          }
-        } else {
-          Expression keyJudgment = cachedKeys[i];
-          if (keyJudgment != null) {
-            inferrer.ensureAssignable(node.keyType, actualTypes[2 * i],
-                keyJudgment, keyJudgment.fileOffset,
-                isVoidAllowed: node.keyType is VoidType);
-
-            Expression valueJudgment = cachedValues[i];
-            inferrer.ensureAssignable(node.valueType, actualTypes[2 * i + 1],
-                valueJudgment, valueJudgment.fileOffset,
-                isVoidAllowed: node.valueType is VoidType);
-          }
-        }
+        checkMapEntry(
+            node.entries[i],
+            node,
+            cachedKeys[i],
+            cachedValues[i],
+            node.keyType,
+            node.valueType,
+            actualTypes[2 * i],
+            actualTypes[2 * i + 1],
+            spreadMapEntryTypes[i]);
       }
     }
     node.inferredType =
diff --git a/pkg/front_end/testcases/control_flow_collection_inference.dart b/pkg/front_end/testcases/control_flow_collection_inference.dart
index aa1639ccacb3..dd1f84abdfca 100644
--- a/pkg/front_end/testcases/control_flow_collection_inference.dart
+++ b/pkg/front_end/testcases/control_flow_collection_inference.dart
@@ -5,72 +5,100 @@
 // Oracle is generic to test the inference in conditions of if-elements.
 oracle<T>([T t]) => true;
 
-testIfElement(dynamic dynVar, List<int> listInt, List<double> listDouble) {
+testIfElement(dynamic dynVar, List<int> listInt, List<double> listDouble,
+    Map<String, int> mapToInt, Map<String, double> mapToDouble) {
   var list10 = [if (oracle("foo")) 42];
   var set10 = {if (oracle("foo")) 42, null};
+  var map10 = {if (oracle("foo")) "bar": 42, "baz": null};
   var list11 = [if (oracle("foo")) dynVar];
   var set11 = {if (oracle("foo")) dynVar, null};
+  var map11 = {if (oracle("foo")) "bar": dynVar, "baz": null};
   var list12 = [if (oracle("foo")) [42]];
   var set12 = {if (oracle("foo")) [42], null};
+  var map12 = {if (oracle("foo")) "bar": [42], "baz": null};
   var list20 = [if (oracle("foo")) ...[42]];
   var set20 = {if (oracle("foo")) ...[42], null};
+  var map20 = {if (oracle("foo")) ...{"bar": 42}, "baz": null};
   var list21 = [if (oracle("foo")) ...[dynVar]];
   var set21 = {if (oracle("foo")) ...[dynVar], null};
+  var map21 = {if (oracle("foo")) ...{"bar": dynVar}, "baz": null};
   var list22 = [if (oracle("foo")) ...[[42]]];
   var set22 = {if (oracle("foo")) ...[[42]], null};
+  var map22 = {if (oracle("foo")) ...{"bar": [42]}, "baz": null};
   var list30 = [if (oracle("foo")) if (oracle()) ...[42]];
   var set30 = {if (oracle("foo")) if (oracle()) ...[42], null};
+  var map30 = {if (oracle("foo")) if (oracle()) ...{"bar": 42}, "baz": null};
   var list31 = [if (oracle("foo")) if (oracle()) ...[dynVar]];
   var set31 = {if (oracle("foo")) if (oracle()) ...[dynVar], null};
+  var map31 = {if (oracle("foo")) if (oracle()) ...{"bar": dynVar}, "baz": null};
   var list33 = [if (oracle("foo")) if (oracle()) ...[[42]]];
   var set33 = {if (oracle("foo")) if (oracle()) ...[[42]], null};
+  var map33 = {if (oracle("foo")) if (oracle()) ...{"bar": [42]}, "baz": null};
   List<List<int>> list40 = [if (oracle("foo")) ...[[]]];
   Set<List<int>> set40 = {if (oracle("foo")) ...[[]], null};
+  Map<String, List<int>> map40 = {if (oracle("foo")) ...{"bar", []}, "baz": null};
   List<List<int>> list41 = [if (oracle("foo")) ...{[]}];
   Set<List<int>> set41 = {if (oracle("foo")) ...{[]}, null};
   List<List<int>> list42 = [if (oracle("foo")) if (oracle()) ...[[]]];
   Set<List<int>> set42 = {if (oracle("foo")) if (oracle()) ...[[]], null};
+  Map<String, List<int>> map42 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
   List<int> list50 = [if (oracle("foo")) ...[]];
   Set<int> set50 = {if (oracle("foo")) ...[], null};
+  Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
   List<int> list51 = [if (oracle("foo")) ...{}];
   Set<int> set51 = {if (oracle("foo")) ...{}, null};
   List<int> list52 = [if (oracle("foo")) if (oracle()) ...[]];
   Set<int> set52 = {if (oracle("foo")) if (oracle()) ...[], null};
+  Map<String, int> map52 = {if (oracle("foo")) if (oracle()) ...{}, "baz": null};
   List<List<int>> list60 = [if (oracle("foo")) ...[[]]];
   Set<List<int>> set60 = {if (oracle("foo")) ...[[]], null};
+  Map<String, List<int>> map60 = {if (oracle("foo")) ...{"bar": []}, "baz": null};
   List<List<int>> list61 = [if (oracle("foo")) if (oracle()) ...[[]]];
   Set<List<int>> set61 = {if (oracle("foo")) if (oracle()) ...[[]], null};
+  Map<String, List<int>> map61 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
   List<List<int>> list70 = [if (oracle("foo")) []];
   Set<List<int>> set70 = {if (oracle("foo")) [], null};
   List<List<int>> list71 = [if (oracle("foo")) if (oracle()) []];
   Set<List<int>> set71 = {if (oracle("foo")) if (oracle()) [], null};
   var list80 = [if (oracle("foo")) 42 else 3.14];
   var set80 = {if (oracle("foo")) 42 else 3.14, null};
+  var map80 = {if (oracle("foo")) "bar": 42 else "bar": 3.14, "baz": null};
   var list81 = [if (oracle("foo")) ...listInt else ...listDouble];
   var set81 = {if (oracle("foo")) ...listInt else ...listDouble, null};
+  var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
   var list82 = [if (oracle("foo")) ...listInt else ...dynVar];
   var set82 = {if (oracle("foo")) ...listInt else ...dynVar, null};
+  var map82 = {if (oracle("foo")) ...mapToInt else ...dynVar, null};
   var list83 = [if (oracle("foo")) 42 else ...listDouble];
   var set83 = {if (oracle("foo")) ...listInt else 3.14, null};
+  var map83 = {if (oracle("foo")) ...mapToInt else 3.14, null};
   List<int> list90 = [if (oracle("foo")) dynVar];
   Set<int> set90 = {if (oracle("foo")) dynVar, null};
+  Map<String, int> map90 = {if (oracle("foo")) "bar": dynVar, "baz": null};
   List<int> list91 = [if (oracle("foo")) ...dynVar];
   Set<int> set91 = {if (oracle("foo")) ...dynVar, null};
+  Map<String, int> map91 = {if (oracle("foo")) ...dynVar, "baz": null};
 }
 
 testIfElementErrors(Map<int, int> map) {
   <int>[if (oracle("foo")) "bar"];
   <int>{if (oracle("foo")) "bar", null};
+  <String, int>{if (oracle("foo")) "bar": "bar", "baz": null};
   <int>[if (oracle("foo")) ...["bar"]];
   <int>{if (oracle("foo")) ...["bar"], null};
+  <String, int>{if (oracle("foo")) ...{"bar": "bar"}, "baz": null};
   <int>[if (oracle("foo")) ...map];
   <int>{if (oracle("foo")) ...map, null};
+  <String, int>{if (oracle("foo")) ...["bar"], "baz": null};
   <String>[if (oracle("foo")) 42 else 3.14];
   <String>{if (oracle("foo")) 42 else 3.14, null};
+  <String, String>{if (oracle("foo")) "bar": 42 else "baz": 3.14, "baz": null};
   <int>[if (oracle("foo")) ...map else 42];
   <int>{if (oracle("foo")) ...map else 42, null};
+  <String, int>{if (oracle("foo")) ...[42] else {"bar": 42}, "baz": null};
   <int>[if (oracle("foo")) 42 else ...map];
   <int>{if (oracle("foo")) ...map else 42, null};
+  <String, int>{if (oracle("foo")) {"bar": 42} else ...[42], "baz": null};
 }
 
 testForElement(dynamic dynVar, List<int> listInt, List<double> listDouble, int
diff --git a/pkg/front_end/testcases/control_flow_collection_inference.dart.legacy.expect b/pkg/front_end/testcases/control_flow_collection_inference.dart.legacy.expect
index ade7d807dc7a..1234843d4b63 100644
--- a/pkg/front_end/testcases/control_flow_collection_inference.dart.legacy.expect
+++ b/pkg/front_end/testcases/control_flow_collection_inference.dart.legacy.expect
@@ -2,1159 +2,1383 @@ library;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:9:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:10:17: Error: Unexpected token 'if'.
 //   var list10 = [if (oracle("foo")) 42];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:10:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:11:16: Error: Unexpected token 'if'.
 //   var set10 = {if (oracle("foo")) 42, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:11:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:12:16: Error: Unexpected token 'if'.
+//   var map10 = {if (oracle("foo")) "bar": 42, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:13:17: Error: Unexpected token 'if'.
 //   var list11 = [if (oracle("foo")) dynVar];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:12:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:14:16: Error: Unexpected token 'if'.
 //   var set11 = {if (oracle("foo")) dynVar, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:13:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:15:16: Error: Unexpected token 'if'.
+//   var map11 = {if (oracle("foo")) "bar": dynVar, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:16:17: Error: Unexpected token 'if'.
 //   var list12 = [if (oracle("foo")) [42]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:14:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:17:16: Error: Unexpected token 'if'.
 //   var set12 = {if (oracle("foo")) [42], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:15:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:18:16: Error: Unexpected token 'if'.
+//   var map12 = {if (oracle("foo")) "bar": [42], "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:19:36: Error: Unexpected token '...'.
 //   var list20 = [if (oracle("foo")) ...[42]];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:15:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:19:17: Error: Unexpected token 'if'.
 //   var list20 = [if (oracle("foo")) ...[42]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:16:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:20:35: Error: Unexpected token '...'.
 //   var set20 = {if (oracle("foo")) ...[42], null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:16:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:20:16: Error: Unexpected token 'if'.
 //   var set20 = {if (oracle("foo")) ...[42], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:17:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:21:35: Error: Unexpected token '...'.
+//   var map20 = {if (oracle("foo")) ...{"bar": 42}, "baz": null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:21:16: Error: Unexpected token 'if'.
+//   var map20 = {if (oracle("foo")) ...{"bar": 42}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:22:36: Error: Unexpected token '...'.
 //   var list21 = [if (oracle("foo")) ...[dynVar]];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:17:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:22:17: Error: Unexpected token 'if'.
 //   var list21 = [if (oracle("foo")) ...[dynVar]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:18:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:23:35: Error: Unexpected token '...'.
 //   var set21 = {if (oracle("foo")) ...[dynVar], null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:18:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:23:16: Error: Unexpected token 'if'.
 //   var set21 = {if (oracle("foo")) ...[dynVar], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:19:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:24:35: Error: Unexpected token '...'.
+//   var map21 = {if (oracle("foo")) ...{"bar": dynVar}, "baz": null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:24:16: Error: Unexpected token 'if'.
+//   var map21 = {if (oracle("foo")) ...{"bar": dynVar}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:25:36: Error: Unexpected token '...'.
 //   var list22 = [if (oracle("foo")) ...[[42]]];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:19:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:25:17: Error: Unexpected token 'if'.
 //   var list22 = [if (oracle("foo")) ...[[42]]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:20:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:26:35: Error: Unexpected token '...'.
 //   var set22 = {if (oracle("foo")) ...[[42]], null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:20:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:26:16: Error: Unexpected token 'if'.
 //   var set22 = {if (oracle("foo")) ...[[42]], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:21:50: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:27:35: Error: Unexpected token '...'.
+//   var map22 = {if (oracle("foo")) ...{"bar": [42]}, "baz": null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:27:16: Error: Unexpected token 'if'.
+//   var map22 = {if (oracle("foo")) ...{"bar": [42]}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:28:50: Error: Unexpected token '...'.
 //   var list30 = [if (oracle("foo")) if (oracle()) ...[42]];
 //                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:21:36: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:28:36: Error: Unexpected token 'if'.
 //   var list30 = [if (oracle("foo")) if (oracle()) ...[42]];
 //                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:21:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:28:17: Error: Unexpected token 'if'.
 //   var list30 = [if (oracle("foo")) if (oracle()) ...[42]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:22:49: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:29:49: Error: Unexpected token '...'.
 //   var set30 = {if (oracle("foo")) if (oracle()) ...[42], null};
 //                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:22:35: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:29:35: Error: Unexpected token 'if'.
 //   var set30 = {if (oracle("foo")) if (oracle()) ...[42], null};
 //                                   ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:22:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:29:16: Error: Unexpected token 'if'.
 //   var set30 = {if (oracle("foo")) if (oracle()) ...[42], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:23:50: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:30:49: Error: Unexpected token '...'.
+//   var map30 = {if (oracle("foo")) if (oracle()) ...{"bar": 42}, "baz": null};
+//                                                 ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:30:35: Error: Unexpected token 'if'.
+//   var map30 = {if (oracle("foo")) if (oracle()) ...{"bar": 42}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:30:16: Error: Unexpected token 'if'.
+//   var map30 = {if (oracle("foo")) if (oracle()) ...{"bar": 42}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:31:50: Error: Unexpected token '...'.
 //   var list31 = [if (oracle("foo")) if (oracle()) ...[dynVar]];
 //                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:23:36: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:31:36: Error: Unexpected token 'if'.
 //   var list31 = [if (oracle("foo")) if (oracle()) ...[dynVar]];
 //                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:23:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:31:17: Error: Unexpected token 'if'.
 //   var list31 = [if (oracle("foo")) if (oracle()) ...[dynVar]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:24:49: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:32:49: Error: Unexpected token '...'.
 //   var set31 = {if (oracle("foo")) if (oracle()) ...[dynVar], null};
 //                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:24:35: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:32:35: Error: Unexpected token 'if'.
 //   var set31 = {if (oracle("foo")) if (oracle()) ...[dynVar], null};
 //                                   ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:24:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:32:16: Error: Unexpected token 'if'.
 //   var set31 = {if (oracle("foo")) if (oracle()) ...[dynVar], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:25:50: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:33:49: Error: Unexpected token '...'.
+//   var map31 = {if (oracle("foo")) if (oracle()) ...{"bar": dynVar}, "baz": null};
+//                                                 ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:33:35: Error: Unexpected token 'if'.
+//   var map31 = {if (oracle("foo")) if (oracle()) ...{"bar": dynVar}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:33:16: Error: Unexpected token 'if'.
+//   var map31 = {if (oracle("foo")) if (oracle()) ...{"bar": dynVar}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:34:50: Error: Unexpected token '...'.
 //   var list33 = [if (oracle("foo")) if (oracle()) ...[[42]]];
 //                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:25:36: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:34:36: Error: Unexpected token 'if'.
 //   var list33 = [if (oracle("foo")) if (oracle()) ...[[42]]];
 //                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:25:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:34:17: Error: Unexpected token 'if'.
 //   var list33 = [if (oracle("foo")) if (oracle()) ...[[42]]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:26:49: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:35:49: Error: Unexpected token '...'.
 //   var set33 = {if (oracle("foo")) if (oracle()) ...[[42]], null};
 //                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:26:35: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:35:35: Error: Unexpected token 'if'.
 //   var set33 = {if (oracle("foo")) if (oracle()) ...[[42]], null};
 //                                   ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:26:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:35:16: Error: Unexpected token 'if'.
 //   var set33 = {if (oracle("foo")) if (oracle()) ...[[42]], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:27:48: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:36:49: Error: Unexpected token '...'.
+//   var map33 = {if (oracle("foo")) if (oracle()) ...{"bar": [42]}, "baz": null};
+//                                                 ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:36:35: Error: Unexpected token 'if'.
+//   var map33 = {if (oracle("foo")) if (oracle()) ...{"bar": [42]}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:36:16: Error: Unexpected token 'if'.
+//   var map33 = {if (oracle("foo")) if (oracle()) ...{"bar": [42]}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:37:48: Error: Unexpected token '...'.
 //   List<List<int>> list40 = [if (oracle("foo")) ...[[]]];
 //                                                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:27:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:37:29: Error: Unexpected token 'if'.
 //   List<List<int>> list40 = [if (oracle("foo")) ...[[]]];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:28:46: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:38:46: Error: Unexpected token '...'.
 //   Set<List<int>> set40 = {if (oracle("foo")) ...[[]], null};
 //                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:28:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:38:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set40 = {if (oracle("foo")) ...[[]], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:29:48: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:39:54: Error: Unexpected token '...'.
+//   Map<String, List<int>> map40 = {if (oracle("foo")) ...{"bar", []}, "baz": null};
+//                                                      ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:39:35: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map40 = {if (oracle("foo")) ...{"bar", []}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:40:48: Error: Unexpected token '...'.
 //   List<List<int>> list41 = [if (oracle("foo")) ...{[]}];
 //                                                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:29:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:40:29: Error: Unexpected token 'if'.
 //   List<List<int>> list41 = [if (oracle("foo")) ...{[]}];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:30:46: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:41:46: Error: Unexpected token '...'.
 //   Set<List<int>> set41 = {if (oracle("foo")) ...{[]}, null};
 //                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:30:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:41:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set41 = {if (oracle("foo")) ...{[]}, null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:31:62: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:42:62: Error: Unexpected token '...'.
 //   List<List<int>> list42 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:31:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:42:48: Error: Unexpected token 'if'.
 //   List<List<int>> list42 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:31:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:42:29: Error: Unexpected token 'if'.
 //   List<List<int>> list42 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:32:60: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:43:60: Error: Unexpected token '...'.
 //   Set<List<int>> set42 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                                                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:32:46: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:43:46: Error: Unexpected token 'if'.
 //   Set<List<int>> set42 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                                              ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:32:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:43:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set42 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:33:42: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:44:68: Error: Unexpected token '...'.
+//   Map<String, List<int>> map42 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:44:54: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map42 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                                      ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:44:35: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map42 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:45:42: Error: Unexpected token '...'.
 //   List<int> list50 = [if (oracle("foo")) ...[]];
 //                                          ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:33:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:45:23: Error: Unexpected token 'if'.
 //   List<int> list50 = [if (oracle("foo")) ...[]];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:34:40: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:46:40: Error: Unexpected token '...'.
 //   Set<int> set50 = {if (oracle("foo")) ...[], null};
 //                                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:34:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:46:21: Error: Unexpected token 'if'.
 //   Set<int> set50 = {if (oracle("foo")) ...[], null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:35:42: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:3: Warning: Expected 2 type arguments.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:40: Error: Unexpected token '...'.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//                                        ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:21: Error: Unexpected token 'if'.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//                     ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:48:42: Error: Unexpected token '...'.
 //   List<int> list51 = [if (oracle("foo")) ...{}];
 //                                          ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:35:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:48:23: Error: Unexpected token 'if'.
 //   List<int> list51 = [if (oracle("foo")) ...{}];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:36:40: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:49:40: Error: Unexpected token '...'.
 //   Set<int> set51 = {if (oracle("foo")) ...{}, null};
 //                                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:36:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:49:21: Error: Unexpected token 'if'.
 //   Set<int> set51 = {if (oracle("foo")) ...{}, null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:37:56: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:50:56: Error: Unexpected token '...'.
 //   List<int> list52 = [if (oracle("foo")) if (oracle()) ...[]];
 //                                                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:37:42: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:50:42: Error: Unexpected token 'if'.
 //   List<int> list52 = [if (oracle("foo")) if (oracle()) ...[]];
 //                                          ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:37:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:50:23: Error: Unexpected token 'if'.
 //   List<int> list52 = [if (oracle("foo")) if (oracle()) ...[]];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:38:54: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:51:54: Error: Unexpected token '...'.
 //   Set<int> set52 = {if (oracle("foo")) if (oracle()) ...[], null};
 //                                                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:38:40: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:51:40: Error: Unexpected token 'if'.
 //   Set<int> set52 = {if (oracle("foo")) if (oracle()) ...[], null};
 //                                        ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:38:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:51:21: Error: Unexpected token 'if'.
 //   Set<int> set52 = {if (oracle("foo")) if (oracle()) ...[], null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:39:48: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:52:62: Error: Unexpected token '...'.
+//   Map<String, int> map52 = {if (oracle("foo")) if (oracle()) ...{}, "baz": null};
+//                                                              ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:52:48: Error: Unexpected token 'if'.
+//   Map<String, int> map52 = {if (oracle("foo")) if (oracle()) ...{}, "baz": null};
+//                                                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:52:29: Error: Unexpected token 'if'.
+//   Map<String, int> map52 = {if (oracle("foo")) if (oracle()) ...{}, "baz": null};
+//                             ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:53:48: Error: Unexpected token '...'.
 //   List<List<int>> list60 = [if (oracle("foo")) ...[[]]];
 //                                                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:39:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:53:29: Error: Unexpected token 'if'.
 //   List<List<int>> list60 = [if (oracle("foo")) ...[[]]];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:40:46: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:54:46: Error: Unexpected token '...'.
 //   Set<List<int>> set60 = {if (oracle("foo")) ...[[]], null};
 //                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:40:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:54:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set60 = {if (oracle("foo")) ...[[]], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:41:62: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:55:54: Error: Unexpected token '...'.
+//   Map<String, List<int>> map60 = {if (oracle("foo")) ...{"bar": []}, "baz": null};
+//                                                      ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:55:35: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map60 = {if (oracle("foo")) ...{"bar": []}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:56:62: Error: Unexpected token '...'.
 //   List<List<int>> list61 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:41:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:56:48: Error: Unexpected token 'if'.
 //   List<List<int>> list61 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:41:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:56:29: Error: Unexpected token 'if'.
 //   List<List<int>> list61 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:42:60: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:57:60: Error: Unexpected token '...'.
 //   Set<List<int>> set61 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                                                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:42:46: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:57:46: Error: Unexpected token 'if'.
 //   Set<List<int>> set61 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                                              ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:42:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:57:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set61 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:43:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:58:68: Error: Unexpected token '...'.
+//   Map<String, List<int>> map61 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:58:54: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map61 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                                      ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:58:35: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map61 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:59:29: Error: Unexpected token 'if'.
 //   List<List<int>> list70 = [if (oracle("foo")) []];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:44:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:60:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set70 = {if (oracle("foo")) [], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:45:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:61:48: Error: Unexpected token 'if'.
 //   List<List<int>> list71 = [if (oracle("foo")) if (oracle()) []];
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:45:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:61:29: Error: Unexpected token 'if'.
 //   List<List<int>> list71 = [if (oracle("foo")) if (oracle()) []];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:46:46: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:62:46: Error: Unexpected token 'if'.
 //   Set<List<int>> set71 = {if (oracle("foo")) if (oracle()) [], null};
 //                                              ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:46:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:62:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set71 = {if (oracle("foo")) if (oracle()) [], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:47:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:63:17: Error: Unexpected token 'if'.
 //   var list80 = [if (oracle("foo")) 42 else 3.14];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:48:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:64:16: Error: Unexpected token 'if'.
 //   var set80 = {if (oracle("foo")) 42 else 3.14, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:49:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:65:16: Error: Unexpected token 'if'.
+//   var map80 = {if (oracle("foo")) "bar": 42 else "bar": 3.14, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:66:36: Error: Unexpected token '...'.
 //   var list81 = [if (oracle("foo")) ...listInt else ...listDouble];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:49:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:66:52: Error: Unexpected token '...'.
 //   var list81 = [if (oracle("foo")) ...listInt else ...listDouble];
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:49:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:66:17: Error: Unexpected token 'if'.
 //   var list81 = [if (oracle("foo")) ...listInt else ...listDouble];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:50:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:67:35: Error: Unexpected token '...'.
 //   var set81 = {if (oracle("foo")) ...listInt else ...listDouble, null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:50:51: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:67:51: Error: Unexpected token '...'.
 //   var set81 = {if (oracle("foo")) ...listInt else ...listDouble, null};
 //                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:50:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:67:16: Error: Unexpected token 'if'.
 //   var set81 = {if (oracle("foo")) ...listInt else ...listDouble, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:51:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:35: Error: Unexpected token '...'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:52: Error: Unexpected token '...'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:16: Error: Unexpected token 'if'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:69:36: Error: Unexpected token '...'.
 //   var list82 = [if (oracle("foo")) ...listInt else ...dynVar];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:51:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:69:52: Error: Unexpected token '...'.
 //   var list82 = [if (oracle("foo")) ...listInt else ...dynVar];
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:51:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:69:17: Error: Unexpected token 'if'.
 //   var list82 = [if (oracle("foo")) ...listInt else ...dynVar];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:52:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:70:35: Error: Unexpected token '...'.
 //   var set82 = {if (oracle("foo")) ...listInt else ...dynVar, null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:52:51: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:70:51: Error: Unexpected token '...'.
 //   var set82 = {if (oracle("foo")) ...listInt else ...dynVar, null};
 //                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:52:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:70:16: Error: Unexpected token 'if'.
 //   var set82 = {if (oracle("foo")) ...listInt else ...dynVar, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:53:44: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:71:35: Error: Unexpected token '...'.
+//   var map82 = {if (oracle("foo")) ...mapToInt else ...dynVar, null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:71:52: Error: Unexpected token '...'.
+//   var map82 = {if (oracle("foo")) ...mapToInt else ...dynVar, null};
+//                                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:71:16: Error: Unexpected token 'if'.
+//   var map82 = {if (oracle("foo")) ...mapToInt else ...dynVar, null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:72:44: Error: Unexpected token '...'.
 //   var list83 = [if (oracle("foo")) 42 else ...listDouble];
 //                                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:53:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:72:17: Error: Unexpected token 'if'.
 //   var list83 = [if (oracle("foo")) 42 else ...listDouble];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:54:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:73:35: Error: Unexpected token '...'.
 //   var set83 = {if (oracle("foo")) ...listInt else 3.14, null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:54:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:73:16: Error: Unexpected token 'if'.
 //   var set83 = {if (oracle("foo")) ...listInt else 3.14, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:55:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:74:35: Error: Unexpected token '...'.
+//   var map83 = {if (oracle("foo")) ...mapToInt else 3.14, null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:74:16: Error: Unexpected token 'if'.
+//   var map83 = {if (oracle("foo")) ...mapToInt else 3.14, null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:75:23: Error: Unexpected token 'if'.
 //   List<int> list90 = [if (oracle("foo")) dynVar];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:56:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:76:21: Error: Unexpected token 'if'.
 //   Set<int> set90 = {if (oracle("foo")) dynVar, null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:57:42: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:77:29: Error: Unexpected token 'if'.
+//   Map<String, int> map90 = {if (oracle("foo")) "bar": dynVar, "baz": null};
+//                             ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:78:42: Error: Unexpected token '...'.
 //   List<int> list91 = [if (oracle("foo")) ...dynVar];
 //                                          ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:57:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:78:23: Error: Unexpected token 'if'.
 //   List<int> list91 = [if (oracle("foo")) ...dynVar];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:58:40: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:79:40: Error: Unexpected token '...'.
 //   Set<int> set91 = {if (oracle("foo")) ...dynVar, null};
 //                                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:58:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:79:21: Error: Unexpected token 'if'.
 //   Set<int> set91 = {if (oracle("foo")) ...dynVar, null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:62:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:80:48: Error: Unexpected token '...'.
+//   Map<String, int> map91 = {if (oracle("foo")) ...dynVar, "baz": null};
+//                                                ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:80:29: Error: Unexpected token 'if'.
+//   Map<String, int> map91 = {if (oracle("foo")) ...dynVar, "baz": null};
+//                             ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:84:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) "bar"];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:63:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:85:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) "bar", null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:64:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:86:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) "bar": "bar", "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:87:28: Error: Unexpected token '...'.
 //   <int>[if (oracle("foo")) ...["bar"]];
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:64:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:87:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) ...["bar"]];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:65:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:88:28: Error: Unexpected token '...'.
 //   <int>{if (oracle("foo")) ...["bar"], null};
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:65:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:88:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) ...["bar"], null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:66:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:89:36: Error: Unexpected token '...'.
+//   <String, int>{if (oracle("foo")) ...{"bar": "bar"}, "baz": null};
+//                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:89:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) ...{"bar": "bar"}, "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:90:28: Error: Unexpected token '...'.
 //   <int>[if (oracle("foo")) ...map];
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:66:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:90:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) ...map];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:67:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:91:28: Error: Unexpected token '...'.
 //   <int>{if (oracle("foo")) ...map, null};
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:67:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:91:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) ...map, null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:68:12: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:92:36: Error: Unexpected token '...'.
+//   <String, int>{if (oracle("foo")) ...["bar"], "baz": null};
+//                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:92:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) ...["bar"], "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:93:12: Error: Unexpected token 'if'.
 //   <String>[if (oracle("foo")) 42 else 3.14];
 //            ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:69:12: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:94:12: Error: Unexpected token 'if'.
 //   <String>{if (oracle("foo")) 42 else 3.14, null};
 //            ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:70:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:95:20: Error: Unexpected token 'if'.
+//   <String, String>{if (oracle("foo")) "bar": 42 else "baz": 3.14, "baz": null};
+//                    ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:96:28: Error: Unexpected token '...'.
 //   <int>[if (oracle("foo")) ...map else 42];
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:70:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:96:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) ...map else 42];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:71:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:97:28: Error: Unexpected token '...'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:71:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:97:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:72:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:98:36: Error: Unexpected token '...'.
+//   <String, int>{if (oracle("foo")) ...[42] else {"bar": 42}, "baz": null};
+//                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:98:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) ...[42] else {"bar": 42}, "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:99:36: Error: Unexpected token '...'.
 //   <int>[if (oracle("foo")) 42 else ...map];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:72:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:99:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) 42 else ...map];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:73:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:100:28: Error: Unexpected token '...'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:73:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:100:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:78:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:101:53: Error: Unexpected token '...'.
+//   <String, int>{if (oracle("foo")) {"bar": 42} else ...[42], "baz": null};
+//                                                     ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:101:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) {"bar": 42} else ...[42], "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:106:17: Error: Unexpected token 'for'.
 //   var list10 = [for (int i = 0; oracle("foo"); i++) 42];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:79:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:107:16: Error: Unexpected token 'for'.
 //   var set10 = {for (int i = 0; oracle("foo"); i++) 42, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:80:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:108:17: Error: Unexpected token 'for'.
 //   var list11 = [for (int i = 0; oracle("foo"); i++) dynVar];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:81:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:109:16: Error: Unexpected token 'for'.
 //   var set11 = {for (int i = 0; oracle("foo"); i++) dynVar, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:82:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:110:17: Error: Unexpected token 'for'.
 //   var list12 = [for (int i = 0; oracle("foo"); i++) [42]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:83:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:111:16: Error: Unexpected token 'for'.
 //   var set12 = {for (int i = 0; oracle("foo"); i++) [42], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:84:53: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:112:53: Error: Unexpected token '...'.
 //   var list20 = [for (int i = 0; oracle("foo"); i++) ...[42]];
 //                                                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:84:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:112:17: Error: Unexpected token 'for'.
 //   var list20 = [for (int i = 0; oracle("foo"); i++) ...[42]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:85:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:113:52: Error: Unexpected token '...'.
 //   var set20 = {for (int i = 0; oracle("foo"); i++) ...[42], null};
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:85:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:113:16: Error: Unexpected token 'for'.
 //   var set20 = {for (int i = 0; oracle("foo"); i++) ...[42], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:86:53: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:114:53: Error: Unexpected token '...'.
 //   var list21 = [for (int i = 0; oracle("foo"); i++) ...[dynVar]];
 //                                                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:86:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:114:17: Error: Unexpected token 'for'.
 //   var list21 = [for (int i = 0; oracle("foo"); i++) ...[dynVar]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:87:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:115:52: Error: Unexpected token '...'.
 //   var set21 = {for (int i = 0; oracle("foo"); i++) ...[dynVar], null};
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:87:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:115:16: Error: Unexpected token 'for'.
 //   var set21 = {for (int i = 0; oracle("foo"); i++) ...[dynVar], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:88:53: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:116:53: Error: Unexpected token '...'.
 //   var list22 = [for (int i = 0; oracle("foo"); i++) ...[[42]]];
 //                                                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:88:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:116:17: Error: Unexpected token 'for'.
 //   var list22 = [for (int i = 0; oracle("foo"); i++) ...[[42]]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:89:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:117:52: Error: Unexpected token '...'.
 //   var set22 = {for (int i = 0; oracle("foo"); i++) ...[[42]], null};
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:89:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:117:16: Error: Unexpected token 'for'.
 //   var set22 = {for (int i = 0; oracle("foo"); i++) ...[[42]], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:90:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:118:67: Error: Unexpected token '...'.
 //   var list30 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42]];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:90:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:118:53: Error: Unexpected token 'if'.
 //   var list30 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42]];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:90:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:118:17: Error: Unexpected token 'for'.
 //   var list30 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:91:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:119:66: Error: Unexpected token '...'.
 //   var set30 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42], null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:91:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:119:52: Error: Unexpected token 'if'.
 //   var set30 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42], null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:91:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:119:16: Error: Unexpected token 'for'.
 //   var set30 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:92:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:120:67: Error: Unexpected token '...'.
 //   var list31 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar]];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:92:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:120:53: Error: Unexpected token 'if'.
 //   var list31 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar]];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:92:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:120:17: Error: Unexpected token 'for'.
 //   var list31 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:93:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:121:66: Error: Unexpected token '...'.
 //   var set31 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar], null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:93:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:121:52: Error: Unexpected token 'if'.
 //   var set31 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar], null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:93:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:121:16: Error: Unexpected token 'for'.
 //   var set31 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:94:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:122:67: Error: Unexpected token '...'.
 //   var list33 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]]];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:94:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:122:53: Error: Unexpected token 'if'.
 //   var list33 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]]];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:94:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:122:17: Error: Unexpected token 'for'.
 //   var list33 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:95:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:123:66: Error: Unexpected token '...'.
 //   var set33 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]], null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:95:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:123:52: Error: Unexpected token 'if'.
 //   var set33 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]], null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:95:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:123:16: Error: Unexpected token 'for'.
 //   var set33 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:96:65: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:124:65: Error: Unexpected token '...'.
 //   List<List<int>> list40 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
 //                                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:96:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:124:29: Error: Unexpected token 'for'.
 //   List<List<int>> list40 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:97:63: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:125:63: Error: Unexpected token '...'.
 //   Set<List<int>> set40 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
 //                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:97:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:125:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set40 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:98:65: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:126:65: Error: Unexpected token '...'.
 //   List<List<int>> list41 = [for (int i = 0; oracle("foo"); i++) ...{[]}];
 //                                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:98:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:126:29: Error: Unexpected token 'for'.
 //   List<List<int>> list41 = [for (int i = 0; oracle("foo"); i++) ...{[]}];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:99:63: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:127:63: Error: Unexpected token '...'.
 //   Set<List<int>> set41 = {for (int i = 0; oracle("foo"); i++) ...{[]}, null};
 //                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:99:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:127:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set41 = {for (int i = 0; oracle("foo"); i++) ...{[]}, null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:100:79: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:128:79: Error: Unexpected token '...'.
 //   List<List<int>> list42 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:100:65: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:128:65: Error: Unexpected token 'if'.
 //   List<List<int>> list42 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                                                                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:100:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:128:29: Error: Unexpected token 'for'.
 //   List<List<int>> list42 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:101:77: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:129:77: Error: Unexpected token '...'.
 //   Set<List<int>> set42 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                                                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:101:63: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:129:63: Error: Unexpected token 'if'.
 //   Set<List<int>> set42 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                                                               ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:101:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:129:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set42 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:102:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:130:59: Error: Unexpected token '...'.
 //   List<int> list50 = [for (int i = 0; oracle("foo"); i++) ...[]];
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:102:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:130:23: Error: Unexpected token 'for'.
 //   List<int> list50 = [for (int i = 0; oracle("foo"); i++) ...[]];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:103:57: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:131:57: Error: Unexpected token '...'.
 //   Set<int> set50 = {for (int i = 0; oracle("foo"); i++) ...[], null};
 //                                                         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:103:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:131:21: Error: Unexpected token 'for'.
 //   Set<int> set50 = {for (int i = 0; oracle("foo"); i++) ...[], null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:104:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:132:59: Error: Unexpected token '...'.
 //   List<int> list51 = [for (int i = 0; oracle("foo"); i++) ...{}];
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:104:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:132:23: Error: Unexpected token 'for'.
 //   List<int> list51 = [for (int i = 0; oracle("foo"); i++) ...{}];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:105:57: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:133:57: Error: Unexpected token '...'.
 //   Set<int> set51 = {for (int i = 0; oracle("foo"); i++) ...{}, null};
 //                                                         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:105:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:133:21: Error: Unexpected token 'for'.
 //   Set<int> set51 = {for (int i = 0; oracle("foo"); i++) ...{}, null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:106:73: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:134:73: Error: Unexpected token '...'.
 //   List<int> list52 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[]];
 //                                                                         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:106:59: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:134:59: Error: Unexpected token 'if'.
 //   List<int> list52 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[]];
 //                                                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:106:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:134:23: Error: Unexpected token 'for'.
 //   List<int> list52 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[]];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:107:71: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:135:71: Error: Unexpected token '...'.
 //   Set<int> set52 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[], null};
 //                                                                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:107:57: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:135:57: Error: Unexpected token 'if'.
 //   Set<int> set52 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[], null};
 //                                                         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:107:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:135:21: Error: Unexpected token 'for'.
 //   Set<int> set52 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[], null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:108:65: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:136:65: Error: Unexpected token '...'.
 //   List<List<int>> list60 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
 //                                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:108:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:136:29: Error: Unexpected token 'for'.
 //   List<List<int>> list60 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:109:63: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:137:63: Error: Unexpected token '...'.
 //   Set<List<int>> set60 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
 //                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:109:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:137:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set60 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:110:79: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:138:79: Error: Unexpected token '...'.
 //   List<List<int>> list61 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:110:65: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:138:65: Error: Unexpected token 'if'.
 //   List<List<int>> list61 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                                                                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:110:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:138:29: Error: Unexpected token 'for'.
 //   List<List<int>> list61 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:111:77: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:139:77: Error: Unexpected token '...'.
 //   Set<List<int>> set61 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                                                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:111:63: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:139:63: Error: Unexpected token 'if'.
 //   Set<List<int>> set61 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                                                               ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:111:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:139:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set61 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:112:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:140:29: Error: Unexpected token 'for'.
 //   List<List<int>> list70 = [for (int i = 0; oracle("foo"); i++) []];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:113:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:141:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set70 = {for (int i = 0; oracle("foo"); i++) [], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:114:65: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:142:65: Error: Unexpected token 'if'.
 //   List<List<int>> list71 = [for (int i = 0; oracle("foo"); i++) if (oracle()) []];
 //                                                                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:114:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:142:29: Error: Unexpected token 'for'.
 //   List<List<int>> list71 = [for (int i = 0; oracle("foo"); i++) if (oracle()) []];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:115:63: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:143:63: Error: Unexpected token 'if'.
 //   Set<List<int>> set71 = {for (int i = 0; oracle("foo"); i++) if (oracle()) [], null};
 //                                                               ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:115:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:143:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set71 = {for (int i = 0; oracle("foo"); i++) if (oracle()) [], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:116:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:144:53: Error: Unexpected token 'if'.
 //   var list80 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:116:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:144:17: Error: Unexpected token 'for'.
 //   var list80 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:117:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:145:52: Error: Unexpected token 'if'.
 //   var set80 = {for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:117:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:145:16: Error: Unexpected token 'for'.
 //   var set80 = {for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:118:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:146:67: Error: Unexpected token '...'.
 //   var list81 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:118:83: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:146:83: Error: Unexpected token '...'.
 //   var list81 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble];
 //                                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:118:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:146:53: Error: Unexpected token 'if'.
 //   var list81 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:118:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:146:17: Error: Unexpected token 'for'.
 //   var list81 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:119:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:147:66: Error: Unexpected token '...'.
 //   var set81 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble, null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:119:82: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:147:82: Error: Unexpected token '...'.
 //   var set81 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble, null};
 //                                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:119:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:147:52: Error: Unexpected token 'if'.
 //   var set81 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble, null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:119:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:147:16: Error: Unexpected token 'for'.
 //   var set81 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:120:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:148:67: Error: Unexpected token '...'.
 //   var list82 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:120:83: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:148:83: Error: Unexpected token '...'.
 //   var list82 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar];
 //                                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:120:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:148:53: Error: Unexpected token 'if'.
 //   var list82 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:120:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:148:17: Error: Unexpected token 'for'.
 //   var list82 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:121:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:149:66: Error: Unexpected token '...'.
 //   var set82 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar, null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:121:82: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:149:82: Error: Unexpected token '...'.
 //   var set82 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar, null};
 //                                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:121:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:149:52: Error: Unexpected token 'if'.
 //   var set82 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar, null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:121:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:149:16: Error: Unexpected token 'for'.
 //   var set82 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:122:75: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:150:75: Error: Unexpected token '...'.
 //   var list83 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...listDouble];
 //                                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:122:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:150:53: Error: Unexpected token 'if'.
 //   var list83 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...listDouble];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:122:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:150:17: Error: Unexpected token 'for'.
 //   var list83 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...listDouble];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:123:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:151:66: Error: Unexpected token '...'.
 //   var set83 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else 3.14, null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:123:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:151:52: Error: Unexpected token 'if'.
 //   var set83 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else 3.14, null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:123:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:151:16: Error: Unexpected token 'for'.
 //   var set83 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else 3.14, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:124:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:152:23: Error: Unexpected token 'for'.
 //   List<int> list90 = [for (int i = 0; oracle("foo"); i++) dynVar];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:125:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:153:21: Error: Unexpected token 'for'.
 //   Set<int> set90 = {for (int i = 0; oracle("foo"); i++) dynVar, null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:126:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:154:59: Error: Unexpected token '...'.
 //   List<int> list91 = [for (int i = 0; oracle("foo"); i++) ...dynVar];
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:126:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:154:23: Error: Unexpected token 'for'.
 //   List<int> list91 = [for (int i = 0; oracle("foo"); i++) ...dynVar];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:127:57: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:155:57: Error: Unexpected token '...'.
 //   Set<int> set91 = {for (int i = 0; oracle("foo"); i++) ...dynVar, null};
 //                                                         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:127:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:155:21: Error: Unexpected token 'for'.
 //   Set<int> set91 = {for (int i = 0; oracle("foo"); i++) ...dynVar, null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:128:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:156:29: Error: Unexpected token 'for'.
 //   List<int> list100 = <int>[for (index = 0; oracle("foo"); index++) 42];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:129:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:157:27: Error: Unexpected token 'for'.
 //   Set<int> set100 = <int>{for (index = 0; oracle("foo"); index++) 42};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:130:18: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:158:18: Error: Unexpected token 'for'.
 //   var list110 = [for (var i in [1, 2, 3]) i];
 //                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:131:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:159:17: Error: Unexpected token 'for'.
 //   var set110 = {for (var i in [1, 2, 3]) i, null};
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:132:24: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:160:24: Error: Unexpected token 'for'.
 //   List<int> list120 = [for (var i in dynVar) i];
 //                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:133:22: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:161:22: Error: Unexpected token 'for'.
 //   Set<int> set120 = {for (var i in dynVar) i, null};
 //                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:137:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:165:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) "bar"];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:138:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:166:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) "bar", null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:139:45: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:167:45: Error: Unexpected token '...'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...["bar"]];
 //                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:139:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:167:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...["bar"]];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:140:45: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:168:45: Error: Unexpected token '...'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...["bar"], null};
 //                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:140:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:168:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...["bar"], null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:141:45: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:169:45: Error: Unexpected token '...'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...map];
 //                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:141:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:169:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...map];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:142:45: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:170:45: Error: Unexpected token '...'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...map, null};
 //                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:142:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:170:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...map, null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:143:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:171:48: Error: Unexpected token 'if'.
 //   <String>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:143:12: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:171:12: Error: Unexpected token 'for'.
 //   <String>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:144:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:172:48: Error: Unexpected token 'if'.
 //   <String>{for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:144:12: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:172:12: Error: Unexpected token 'for'.
 //   <String>{for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:145:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:173:59: Error: Unexpected token '...'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42];
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:145:45: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:173:45: Error: Unexpected token 'if'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42];
 //                                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:145:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:173:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:146:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:174:59: Error: Unexpected token '...'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:146:45: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:174:45: Error: Unexpected token 'if'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:146:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:174:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:147:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:175:67: Error: Unexpected token '...'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...map];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:147:45: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:175:45: Error: Unexpected token 'if'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...map];
 //                                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:147:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:175:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...map];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:148:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:176:59: Error: Unexpected token '...'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:148:45: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:176:45: Error: Unexpected token 'if'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:148:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:176:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:151:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:179:9: Error: Unexpected token 'for'.
 //   <int>[for (i in <int>[1]) i];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:152:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:180:9: Error: Unexpected token 'for'.
 //   <int>{for (i in <int>[1]) i, null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:154:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:182:17: Error: Unexpected token 'for'.
 //   var list10 = [for (var i in "not iterable") i];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:155:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:183:16: Error: Unexpected token 'for'.
 //   var set10 = {for (var i in "not iterable") i, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:156:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:184:17: Error: Unexpected token 'for'.
 //   var list20 = [for (int i in ["not", "int"]) i];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:157:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:185:16: Error: Unexpected token 'for'.
 //   var set20 = {for (int i in ["not", "int"]) i, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:158:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:186:23: Error: Unexpected token 'for'.
 //   var list30 = [await for (var i in "not stream") i];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:159:22: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:187:22: Error: Unexpected token 'for'.
 //   var set30 = {await for (var i in "not stream") i, null};
 //                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:160:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:188:23: Error: Unexpected token 'for'.
 //   var list40 = [await for (int i in Stream.fromIterable(["not", "int"])) i];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:161:22: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:189:22: Error: Unexpected token 'for'.
 //   var set40 = {await for (int i in Stream.fromIterable(["not", "int"])) i, null};
 //                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:162:17: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:190:17: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
 // Try removing the keyword, or use a for-each statement.
 //   var list50 = [await for (;;) 42];
 //                 ^^^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:162:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:190:23: Error: Unexpected token 'for'.
 //   var list50 = [await for (;;) 42];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:163:16: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:191:16: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
 // Try removing the keyword, or use a for-each statement.
 //   var set50 = {await for (;;) 42, null};
 //                ^^^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:163:22: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:191:22: Error: Unexpected token 'for'.
 //   var set50 = {await for (;;) 42, null};
 //                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:164:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:192:17: Error: Unexpected token 'for'.
 //   var list60 = [for (; "not bool";) 42];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:165:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:193:16: Error: Unexpected token 'for'.
 //   var set60 = {for (; "not bool";) 42, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:169:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:197:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
 // Try marking the function body with either 'async' or 'async*', or removing the 'await' before the for loop.
 //   <int>[await for (int i in stream) i];
 //                          ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:169:15: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:197:15: Error: Unexpected token 'for'.
 //   <int>[await for (int i in stream) i];
 //               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:170:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:198:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
 // Try marking the function body with either 'async' or 'async*', or removing the 'await' before the for loop.
 //   <int>{await for (int i in stream) i};
 //                          ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:170:15: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:198:15: Error: Unexpected token 'for'.
 //   <int>{await for (int i in stream) i};
 //               ^^^
 //
@@ -1164,71 +1388,98 @@ import "dart:async" as asy;
 
 static method oracle<T extends core::Object = dynamic>([self::oracle::T t = null]) → dynamic
   return true;
-static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble) → dynamic {
+static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble, core::Map<core::String, core::int> mapToInt, core::Map<core::String, core::double> mapToDouble) → dynamic {
   dynamic list10 = <dynamic>[];
   dynamic set10 = <dynamic>{null};
+  dynamic map10 = <dynamic, dynamic>{"baz": null};
   dynamic list11 = <dynamic>[];
   dynamic set11 = <dynamic>{null};
+  dynamic map11 = <dynamic, dynamic>{"baz": null};
   dynamic list12 = <dynamic>[];
   dynamic set12 = <dynamic>{null};
+  dynamic map12 = <dynamic, dynamic>{"baz": null};
   dynamic list20 = <dynamic>[];
   dynamic set20 = <dynamic>{null};
+  dynamic map20 = <dynamic, dynamic>{"baz": null};
   dynamic list21 = <dynamic>[];
   dynamic set21 = <dynamic>{null};
+  dynamic map21 = <dynamic, dynamic>{"baz": null};
   dynamic list22 = <dynamic>[];
   dynamic set22 = <dynamic>{null};
+  dynamic map22 = <dynamic, dynamic>{"baz": null};
   dynamic list30 = <dynamic>[];
   dynamic set30 = <dynamic>{null};
+  dynamic map30 = <dynamic, dynamic>{"baz": null};
   dynamic list31 = <dynamic>[];
   dynamic set31 = <dynamic>{null};
+  dynamic map31 = <dynamic, dynamic>{"baz": null};
   dynamic list33 = <dynamic>[];
   dynamic set33 = <dynamic>{null};
+  dynamic map33 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list40 = <dynamic>[];
   core::Set<core::List<core::int>> set40 = <dynamic>{null};
+  core::Map<core::String, core::List<core::int>> map40 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list41 = <dynamic>[];
   core::Set<core::List<core::int>> set41 = <dynamic>{null};
   core::List<core::List<core::int>> list42 = <dynamic>[];
   core::Set<core::List<core::int>> set42 = <dynamic>{null};
+  core::Map<core::String, core::List<core::int>> map42 = <dynamic, dynamic>{"baz": null};
   core::List<core::int> list50 = <dynamic>[];
   core::Set<core::int> set50 = <dynamic>{null};
+  core::Map<dynamic, dynamic> map50 = <dynamic, dynamic>{"baz": null};
   core::List<core::int> list51 = <dynamic>[];
   core::Set<core::int> set51 = <dynamic>{null};
   core::List<core::int> list52 = <dynamic>[];
   core::Set<core::int> set52 = <dynamic>{null};
+  core::Map<core::String, core::int> map52 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list60 = <dynamic>[];
   core::Set<core::List<core::int>> set60 = <dynamic>{null};
+  core::Map<core::String, core::List<core::int>> map60 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list61 = <dynamic>[];
   core::Set<core::List<core::int>> set61 = <dynamic>{null};
+  core::Map<core::String, core::List<core::int>> map61 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list70 = <dynamic>[];
   core::Set<core::List<core::int>> set70 = <dynamic>{null};
   core::List<core::List<core::int>> list71 = <dynamic>[];
   core::Set<core::List<core::int>> set71 = <dynamic>{null};
   dynamic list80 = <dynamic>[];
   dynamic set80 = <dynamic>{null};
+  dynamic map80 = <dynamic, dynamic>{"baz": null};
   dynamic list81 = <dynamic>[];
   dynamic set81 = <dynamic>{null};
+  dynamic map81 = <dynamic>{null};
   dynamic list82 = <dynamic>[];
   dynamic set82 = <dynamic>{null};
+  dynamic map82 = <dynamic>{null};
   dynamic list83 = <dynamic>[];
   dynamic set83 = <dynamic>{null};
+  dynamic map83 = <dynamic>{null};
   core::List<core::int> list90 = <dynamic>[];
   core::Set<core::int> set90 = <dynamic>{null};
+  core::Map<core::String, core::int> map90 = <dynamic, dynamic>{"baz": null};
   core::List<core::int> list91 = <dynamic>[];
   core::Set<core::int> set91 = <dynamic>{null};
+  core::Map<core::String, core::int> map91 = <dynamic, dynamic>{"baz": null};
 }
 static method testIfElementErrors(core::Map<core::int, core::int> map) → dynamic {
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
   <core::String>[];
   <core::String>{null};
+  <core::String, core::String>{"baz": null};
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
 }
 static method testForElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble, core::int index) → dynamic {
   dynamic list10 = <dynamic>[];
diff --git a/pkg/front_end/testcases/control_flow_collection_inference.dart.legacy.transformed.expect b/pkg/front_end/testcases/control_flow_collection_inference.dart.legacy.transformed.expect
index 3f29426ebeca..7658edf16ccb 100644
--- a/pkg/front_end/testcases/control_flow_collection_inference.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/control_flow_collection_inference.dart.legacy.transformed.expect
@@ -2,1159 +2,1383 @@ library;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:9:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:10:17: Error: Unexpected token 'if'.
 //   var list10 = [if (oracle("foo")) 42];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:10:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:11:16: Error: Unexpected token 'if'.
 //   var set10 = {if (oracle("foo")) 42, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:11:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:12:16: Error: Unexpected token 'if'.
+//   var map10 = {if (oracle("foo")) "bar": 42, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:13:17: Error: Unexpected token 'if'.
 //   var list11 = [if (oracle("foo")) dynVar];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:12:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:14:16: Error: Unexpected token 'if'.
 //   var set11 = {if (oracle("foo")) dynVar, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:13:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:15:16: Error: Unexpected token 'if'.
+//   var map11 = {if (oracle("foo")) "bar": dynVar, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:16:17: Error: Unexpected token 'if'.
 //   var list12 = [if (oracle("foo")) [42]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:14:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:17:16: Error: Unexpected token 'if'.
 //   var set12 = {if (oracle("foo")) [42], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:15:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:18:16: Error: Unexpected token 'if'.
+//   var map12 = {if (oracle("foo")) "bar": [42], "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:19:36: Error: Unexpected token '...'.
 //   var list20 = [if (oracle("foo")) ...[42]];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:15:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:19:17: Error: Unexpected token 'if'.
 //   var list20 = [if (oracle("foo")) ...[42]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:16:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:20:35: Error: Unexpected token '...'.
 //   var set20 = {if (oracle("foo")) ...[42], null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:16:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:20:16: Error: Unexpected token 'if'.
 //   var set20 = {if (oracle("foo")) ...[42], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:17:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:21:35: Error: Unexpected token '...'.
+//   var map20 = {if (oracle("foo")) ...{"bar": 42}, "baz": null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:21:16: Error: Unexpected token 'if'.
+//   var map20 = {if (oracle("foo")) ...{"bar": 42}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:22:36: Error: Unexpected token '...'.
 //   var list21 = [if (oracle("foo")) ...[dynVar]];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:17:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:22:17: Error: Unexpected token 'if'.
 //   var list21 = [if (oracle("foo")) ...[dynVar]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:18:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:23:35: Error: Unexpected token '...'.
 //   var set21 = {if (oracle("foo")) ...[dynVar], null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:18:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:23:16: Error: Unexpected token 'if'.
 //   var set21 = {if (oracle("foo")) ...[dynVar], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:19:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:24:35: Error: Unexpected token '...'.
+//   var map21 = {if (oracle("foo")) ...{"bar": dynVar}, "baz": null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:24:16: Error: Unexpected token 'if'.
+//   var map21 = {if (oracle("foo")) ...{"bar": dynVar}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:25:36: Error: Unexpected token '...'.
 //   var list22 = [if (oracle("foo")) ...[[42]]];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:19:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:25:17: Error: Unexpected token 'if'.
 //   var list22 = [if (oracle("foo")) ...[[42]]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:20:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:26:35: Error: Unexpected token '...'.
 //   var set22 = {if (oracle("foo")) ...[[42]], null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:20:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:26:16: Error: Unexpected token 'if'.
 //   var set22 = {if (oracle("foo")) ...[[42]], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:21:50: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:27:35: Error: Unexpected token '...'.
+//   var map22 = {if (oracle("foo")) ...{"bar": [42]}, "baz": null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:27:16: Error: Unexpected token 'if'.
+//   var map22 = {if (oracle("foo")) ...{"bar": [42]}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:28:50: Error: Unexpected token '...'.
 //   var list30 = [if (oracle("foo")) if (oracle()) ...[42]];
 //                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:21:36: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:28:36: Error: Unexpected token 'if'.
 //   var list30 = [if (oracle("foo")) if (oracle()) ...[42]];
 //                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:21:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:28:17: Error: Unexpected token 'if'.
 //   var list30 = [if (oracle("foo")) if (oracle()) ...[42]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:22:49: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:29:49: Error: Unexpected token '...'.
 //   var set30 = {if (oracle("foo")) if (oracle()) ...[42], null};
 //                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:22:35: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:29:35: Error: Unexpected token 'if'.
 //   var set30 = {if (oracle("foo")) if (oracle()) ...[42], null};
 //                                   ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:22:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:29:16: Error: Unexpected token 'if'.
 //   var set30 = {if (oracle("foo")) if (oracle()) ...[42], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:23:50: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:30:49: Error: Unexpected token '...'.
+//   var map30 = {if (oracle("foo")) if (oracle()) ...{"bar": 42}, "baz": null};
+//                                                 ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:30:35: Error: Unexpected token 'if'.
+//   var map30 = {if (oracle("foo")) if (oracle()) ...{"bar": 42}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:30:16: Error: Unexpected token 'if'.
+//   var map30 = {if (oracle("foo")) if (oracle()) ...{"bar": 42}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:31:50: Error: Unexpected token '...'.
 //   var list31 = [if (oracle("foo")) if (oracle()) ...[dynVar]];
 //                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:23:36: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:31:36: Error: Unexpected token 'if'.
 //   var list31 = [if (oracle("foo")) if (oracle()) ...[dynVar]];
 //                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:23:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:31:17: Error: Unexpected token 'if'.
 //   var list31 = [if (oracle("foo")) if (oracle()) ...[dynVar]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:24:49: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:32:49: Error: Unexpected token '...'.
 //   var set31 = {if (oracle("foo")) if (oracle()) ...[dynVar], null};
 //                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:24:35: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:32:35: Error: Unexpected token 'if'.
 //   var set31 = {if (oracle("foo")) if (oracle()) ...[dynVar], null};
 //                                   ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:24:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:32:16: Error: Unexpected token 'if'.
 //   var set31 = {if (oracle("foo")) if (oracle()) ...[dynVar], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:25:50: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:33:49: Error: Unexpected token '...'.
+//   var map31 = {if (oracle("foo")) if (oracle()) ...{"bar": dynVar}, "baz": null};
+//                                                 ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:33:35: Error: Unexpected token 'if'.
+//   var map31 = {if (oracle("foo")) if (oracle()) ...{"bar": dynVar}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:33:16: Error: Unexpected token 'if'.
+//   var map31 = {if (oracle("foo")) if (oracle()) ...{"bar": dynVar}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:34:50: Error: Unexpected token '...'.
 //   var list33 = [if (oracle("foo")) if (oracle()) ...[[42]]];
 //                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:25:36: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:34:36: Error: Unexpected token 'if'.
 //   var list33 = [if (oracle("foo")) if (oracle()) ...[[42]]];
 //                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:25:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:34:17: Error: Unexpected token 'if'.
 //   var list33 = [if (oracle("foo")) if (oracle()) ...[[42]]];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:26:49: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:35:49: Error: Unexpected token '...'.
 //   var set33 = {if (oracle("foo")) if (oracle()) ...[[42]], null};
 //                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:26:35: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:35:35: Error: Unexpected token 'if'.
 //   var set33 = {if (oracle("foo")) if (oracle()) ...[[42]], null};
 //                                   ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:26:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:35:16: Error: Unexpected token 'if'.
 //   var set33 = {if (oracle("foo")) if (oracle()) ...[[42]], null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:27:48: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:36:49: Error: Unexpected token '...'.
+//   var map33 = {if (oracle("foo")) if (oracle()) ...{"bar": [42]}, "baz": null};
+//                                                 ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:36:35: Error: Unexpected token 'if'.
+//   var map33 = {if (oracle("foo")) if (oracle()) ...{"bar": [42]}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:36:16: Error: Unexpected token 'if'.
+//   var map33 = {if (oracle("foo")) if (oracle()) ...{"bar": [42]}, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:37:48: Error: Unexpected token '...'.
 //   List<List<int>> list40 = [if (oracle("foo")) ...[[]]];
 //                                                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:27:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:37:29: Error: Unexpected token 'if'.
 //   List<List<int>> list40 = [if (oracle("foo")) ...[[]]];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:28:46: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:38:46: Error: Unexpected token '...'.
 //   Set<List<int>> set40 = {if (oracle("foo")) ...[[]], null};
 //                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:28:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:38:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set40 = {if (oracle("foo")) ...[[]], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:29:48: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:39:54: Error: Unexpected token '...'.
+//   Map<String, List<int>> map40 = {if (oracle("foo")) ...{"bar", []}, "baz": null};
+//                                                      ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:39:35: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map40 = {if (oracle("foo")) ...{"bar", []}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:40:48: Error: Unexpected token '...'.
 //   List<List<int>> list41 = [if (oracle("foo")) ...{[]}];
 //                                                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:29:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:40:29: Error: Unexpected token 'if'.
 //   List<List<int>> list41 = [if (oracle("foo")) ...{[]}];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:30:46: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:41:46: Error: Unexpected token '...'.
 //   Set<List<int>> set41 = {if (oracle("foo")) ...{[]}, null};
 //                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:30:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:41:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set41 = {if (oracle("foo")) ...{[]}, null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:31:62: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:42:62: Error: Unexpected token '...'.
 //   List<List<int>> list42 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:31:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:42:48: Error: Unexpected token 'if'.
 //   List<List<int>> list42 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:31:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:42:29: Error: Unexpected token 'if'.
 //   List<List<int>> list42 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:32:60: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:43:60: Error: Unexpected token '...'.
 //   Set<List<int>> set42 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                                                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:32:46: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:43:46: Error: Unexpected token 'if'.
 //   Set<List<int>> set42 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                                              ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:32:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:43:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set42 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:33:42: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:44:68: Error: Unexpected token '...'.
+//   Map<String, List<int>> map42 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:44:54: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map42 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                                      ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:44:35: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map42 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:45:42: Error: Unexpected token '...'.
 //   List<int> list50 = [if (oracle("foo")) ...[]];
 //                                          ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:33:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:45:23: Error: Unexpected token 'if'.
 //   List<int> list50 = [if (oracle("foo")) ...[]];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:34:40: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:46:40: Error: Unexpected token '...'.
 //   Set<int> set50 = {if (oracle("foo")) ...[], null};
 //                                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:34:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:46:21: Error: Unexpected token 'if'.
 //   Set<int> set50 = {if (oracle("foo")) ...[], null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:35:42: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:3: Warning: Expected 2 type arguments.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:40: Error: Unexpected token '...'.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//                                        ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:21: Error: Unexpected token 'if'.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//                     ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:48:42: Error: Unexpected token '...'.
 //   List<int> list51 = [if (oracle("foo")) ...{}];
 //                                          ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:35:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:48:23: Error: Unexpected token 'if'.
 //   List<int> list51 = [if (oracle("foo")) ...{}];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:36:40: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:49:40: Error: Unexpected token '...'.
 //   Set<int> set51 = {if (oracle("foo")) ...{}, null};
 //                                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:36:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:49:21: Error: Unexpected token 'if'.
 //   Set<int> set51 = {if (oracle("foo")) ...{}, null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:37:56: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:50:56: Error: Unexpected token '...'.
 //   List<int> list52 = [if (oracle("foo")) if (oracle()) ...[]];
 //                                                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:37:42: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:50:42: Error: Unexpected token 'if'.
 //   List<int> list52 = [if (oracle("foo")) if (oracle()) ...[]];
 //                                          ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:37:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:50:23: Error: Unexpected token 'if'.
 //   List<int> list52 = [if (oracle("foo")) if (oracle()) ...[]];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:38:54: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:51:54: Error: Unexpected token '...'.
 //   Set<int> set52 = {if (oracle("foo")) if (oracle()) ...[], null};
 //                                                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:38:40: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:51:40: Error: Unexpected token 'if'.
 //   Set<int> set52 = {if (oracle("foo")) if (oracle()) ...[], null};
 //                                        ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:38:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:51:21: Error: Unexpected token 'if'.
 //   Set<int> set52 = {if (oracle("foo")) if (oracle()) ...[], null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:39:48: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:52:62: Error: Unexpected token '...'.
+//   Map<String, int> map52 = {if (oracle("foo")) if (oracle()) ...{}, "baz": null};
+//                                                              ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:52:48: Error: Unexpected token 'if'.
+//   Map<String, int> map52 = {if (oracle("foo")) if (oracle()) ...{}, "baz": null};
+//                                                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:52:29: Error: Unexpected token 'if'.
+//   Map<String, int> map52 = {if (oracle("foo")) if (oracle()) ...{}, "baz": null};
+//                             ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:53:48: Error: Unexpected token '...'.
 //   List<List<int>> list60 = [if (oracle("foo")) ...[[]]];
 //                                                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:39:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:53:29: Error: Unexpected token 'if'.
 //   List<List<int>> list60 = [if (oracle("foo")) ...[[]]];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:40:46: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:54:46: Error: Unexpected token '...'.
 //   Set<List<int>> set60 = {if (oracle("foo")) ...[[]], null};
 //                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:40:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:54:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set60 = {if (oracle("foo")) ...[[]], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:41:62: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:55:54: Error: Unexpected token '...'.
+//   Map<String, List<int>> map60 = {if (oracle("foo")) ...{"bar": []}, "baz": null};
+//                                                      ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:55:35: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map60 = {if (oracle("foo")) ...{"bar": []}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:56:62: Error: Unexpected token '...'.
 //   List<List<int>> list61 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                                                              ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:41:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:56:48: Error: Unexpected token 'if'.
 //   List<List<int>> list61 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:41:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:56:29: Error: Unexpected token 'if'.
 //   List<List<int>> list61 = [if (oracle("foo")) if (oracle()) ...[[]]];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:42:60: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:57:60: Error: Unexpected token '...'.
 //   Set<List<int>> set61 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                                                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:42:46: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:57:46: Error: Unexpected token 'if'.
 //   Set<List<int>> set61 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                                              ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:42:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:57:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set61 = {if (oracle("foo")) if (oracle()) ...[[]], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:43:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:58:68: Error: Unexpected token '...'.
+//   Map<String, List<int>> map61 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:58:54: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map61 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                                      ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:58:35: Error: Unexpected token 'if'.
+//   Map<String, List<int>> map61 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                   ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:59:29: Error: Unexpected token 'if'.
 //   List<List<int>> list70 = [if (oracle("foo")) []];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:44:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:60:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set70 = {if (oracle("foo")) [], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:45:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:61:48: Error: Unexpected token 'if'.
 //   List<List<int>> list71 = [if (oracle("foo")) if (oracle()) []];
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:45:29: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:61:29: Error: Unexpected token 'if'.
 //   List<List<int>> list71 = [if (oracle("foo")) if (oracle()) []];
 //                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:46:46: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:62:46: Error: Unexpected token 'if'.
 //   Set<List<int>> set71 = {if (oracle("foo")) if (oracle()) [], null};
 //                                              ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:46:27: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:62:27: Error: Unexpected token 'if'.
 //   Set<List<int>> set71 = {if (oracle("foo")) if (oracle()) [], null};
 //                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:47:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:63:17: Error: Unexpected token 'if'.
 //   var list80 = [if (oracle("foo")) 42 else 3.14];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:48:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:64:16: Error: Unexpected token 'if'.
 //   var set80 = {if (oracle("foo")) 42 else 3.14, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:49:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:65:16: Error: Unexpected token 'if'.
+//   var map80 = {if (oracle("foo")) "bar": 42 else "bar": 3.14, "baz": null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:66:36: Error: Unexpected token '...'.
 //   var list81 = [if (oracle("foo")) ...listInt else ...listDouble];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:49:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:66:52: Error: Unexpected token '...'.
 //   var list81 = [if (oracle("foo")) ...listInt else ...listDouble];
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:49:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:66:17: Error: Unexpected token 'if'.
 //   var list81 = [if (oracle("foo")) ...listInt else ...listDouble];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:50:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:67:35: Error: Unexpected token '...'.
 //   var set81 = {if (oracle("foo")) ...listInt else ...listDouble, null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:50:51: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:67:51: Error: Unexpected token '...'.
 //   var set81 = {if (oracle("foo")) ...listInt else ...listDouble, null};
 //                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:50:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:67:16: Error: Unexpected token 'if'.
 //   var set81 = {if (oracle("foo")) ...listInt else ...listDouble, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:51:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:35: Error: Unexpected token '...'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:52: Error: Unexpected token '...'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:16: Error: Unexpected token 'if'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:69:36: Error: Unexpected token '...'.
 //   var list82 = [if (oracle("foo")) ...listInt else ...dynVar];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:51:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:69:52: Error: Unexpected token '...'.
 //   var list82 = [if (oracle("foo")) ...listInt else ...dynVar];
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:51:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:69:17: Error: Unexpected token 'if'.
 //   var list82 = [if (oracle("foo")) ...listInt else ...dynVar];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:52:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:70:35: Error: Unexpected token '...'.
 //   var set82 = {if (oracle("foo")) ...listInt else ...dynVar, null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:52:51: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:70:51: Error: Unexpected token '...'.
 //   var set82 = {if (oracle("foo")) ...listInt else ...dynVar, null};
 //                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:52:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:70:16: Error: Unexpected token 'if'.
 //   var set82 = {if (oracle("foo")) ...listInt else ...dynVar, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:53:44: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:71:35: Error: Unexpected token '...'.
+//   var map82 = {if (oracle("foo")) ...mapToInt else ...dynVar, null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:71:52: Error: Unexpected token '...'.
+//   var map82 = {if (oracle("foo")) ...mapToInt else ...dynVar, null};
+//                                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:71:16: Error: Unexpected token 'if'.
+//   var map82 = {if (oracle("foo")) ...mapToInt else ...dynVar, null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:72:44: Error: Unexpected token '...'.
 //   var list83 = [if (oracle("foo")) 42 else ...listDouble];
 //                                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:53:17: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:72:17: Error: Unexpected token 'if'.
 //   var list83 = [if (oracle("foo")) 42 else ...listDouble];
 //                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:54:35: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:73:35: Error: Unexpected token '...'.
 //   var set83 = {if (oracle("foo")) ...listInt else 3.14, null};
 //                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:54:16: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:73:16: Error: Unexpected token 'if'.
 //   var set83 = {if (oracle("foo")) ...listInt else 3.14, null};
 //                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:55:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:74:35: Error: Unexpected token '...'.
+//   var map83 = {if (oracle("foo")) ...mapToInt else 3.14, null};
+//                                   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:74:16: Error: Unexpected token 'if'.
+//   var map83 = {if (oracle("foo")) ...mapToInt else 3.14, null};
+//                ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:75:23: Error: Unexpected token 'if'.
 //   List<int> list90 = [if (oracle("foo")) dynVar];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:56:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:76:21: Error: Unexpected token 'if'.
 //   Set<int> set90 = {if (oracle("foo")) dynVar, null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:57:42: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:77:29: Error: Unexpected token 'if'.
+//   Map<String, int> map90 = {if (oracle("foo")) "bar": dynVar, "baz": null};
+//                             ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:78:42: Error: Unexpected token '...'.
 //   List<int> list91 = [if (oracle("foo")) ...dynVar];
 //                                          ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:57:23: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:78:23: Error: Unexpected token 'if'.
 //   List<int> list91 = [if (oracle("foo")) ...dynVar];
 //                       ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:58:40: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:79:40: Error: Unexpected token '...'.
 //   Set<int> set91 = {if (oracle("foo")) ...dynVar, null};
 //                                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:58:21: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:79:21: Error: Unexpected token 'if'.
 //   Set<int> set91 = {if (oracle("foo")) ...dynVar, null};
 //                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:62:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:80:48: Error: Unexpected token '...'.
+//   Map<String, int> map91 = {if (oracle("foo")) ...dynVar, "baz": null};
+//                                                ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:80:29: Error: Unexpected token 'if'.
+//   Map<String, int> map91 = {if (oracle("foo")) ...dynVar, "baz": null};
+//                             ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:84:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) "bar"];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:63:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:85:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) "bar", null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:64:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:86:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) "bar": "bar", "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:87:28: Error: Unexpected token '...'.
 //   <int>[if (oracle("foo")) ...["bar"]];
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:64:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:87:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) ...["bar"]];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:65:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:88:28: Error: Unexpected token '...'.
 //   <int>{if (oracle("foo")) ...["bar"], null};
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:65:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:88:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) ...["bar"], null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:66:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:89:36: Error: Unexpected token '...'.
+//   <String, int>{if (oracle("foo")) ...{"bar": "bar"}, "baz": null};
+//                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:89:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) ...{"bar": "bar"}, "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:90:28: Error: Unexpected token '...'.
 //   <int>[if (oracle("foo")) ...map];
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:66:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:90:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) ...map];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:67:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:91:28: Error: Unexpected token '...'.
 //   <int>{if (oracle("foo")) ...map, null};
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:67:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:91:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) ...map, null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:68:12: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:92:36: Error: Unexpected token '...'.
+//   <String, int>{if (oracle("foo")) ...["bar"], "baz": null};
+//                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:92:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) ...["bar"], "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:93:12: Error: Unexpected token 'if'.
 //   <String>[if (oracle("foo")) 42 else 3.14];
 //            ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:69:12: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:94:12: Error: Unexpected token 'if'.
 //   <String>{if (oracle("foo")) 42 else 3.14, null};
 //            ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:70:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:95:20: Error: Unexpected token 'if'.
+//   <String, String>{if (oracle("foo")) "bar": 42 else "baz": 3.14, "baz": null};
+//                    ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:96:28: Error: Unexpected token '...'.
 //   <int>[if (oracle("foo")) ...map else 42];
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:70:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:96:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) ...map else 42];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:71:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:97:28: Error: Unexpected token '...'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:71:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:97:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:72:36: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:98:36: Error: Unexpected token '...'.
+//   <String, int>{if (oracle("foo")) ...[42] else {"bar": 42}, "baz": null};
+//                                    ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:98:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) ...[42] else {"bar": 42}, "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:99:36: Error: Unexpected token '...'.
 //   <int>[if (oracle("foo")) 42 else ...map];
 //                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:72:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:99:9: Error: Unexpected token 'if'.
 //   <int>[if (oracle("foo")) 42 else ...map];
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:73:28: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:100:28: Error: Unexpected token '...'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //                            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:73:9: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:100:9: Error: Unexpected token 'if'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:78:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:101:53: Error: Unexpected token '...'.
+//   <String, int>{if (oracle("foo")) {"bar": 42} else ...[42], "baz": null};
+//                                                     ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:101:17: Error: Unexpected token 'if'.
+//   <String, int>{if (oracle("foo")) {"bar": 42} else ...[42], "baz": null};
+//                 ^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:106:17: Error: Unexpected token 'for'.
 //   var list10 = [for (int i = 0; oracle("foo"); i++) 42];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:79:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:107:16: Error: Unexpected token 'for'.
 //   var set10 = {for (int i = 0; oracle("foo"); i++) 42, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:80:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:108:17: Error: Unexpected token 'for'.
 //   var list11 = [for (int i = 0; oracle("foo"); i++) dynVar];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:81:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:109:16: Error: Unexpected token 'for'.
 //   var set11 = {for (int i = 0; oracle("foo"); i++) dynVar, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:82:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:110:17: Error: Unexpected token 'for'.
 //   var list12 = [for (int i = 0; oracle("foo"); i++) [42]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:83:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:111:16: Error: Unexpected token 'for'.
 //   var set12 = {for (int i = 0; oracle("foo"); i++) [42], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:84:53: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:112:53: Error: Unexpected token '...'.
 //   var list20 = [for (int i = 0; oracle("foo"); i++) ...[42]];
 //                                                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:84:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:112:17: Error: Unexpected token 'for'.
 //   var list20 = [for (int i = 0; oracle("foo"); i++) ...[42]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:85:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:113:52: Error: Unexpected token '...'.
 //   var set20 = {for (int i = 0; oracle("foo"); i++) ...[42], null};
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:85:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:113:16: Error: Unexpected token 'for'.
 //   var set20 = {for (int i = 0; oracle("foo"); i++) ...[42], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:86:53: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:114:53: Error: Unexpected token '...'.
 //   var list21 = [for (int i = 0; oracle("foo"); i++) ...[dynVar]];
 //                                                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:86:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:114:17: Error: Unexpected token 'for'.
 //   var list21 = [for (int i = 0; oracle("foo"); i++) ...[dynVar]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:87:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:115:52: Error: Unexpected token '...'.
 //   var set21 = {for (int i = 0; oracle("foo"); i++) ...[dynVar], null};
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:87:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:115:16: Error: Unexpected token 'for'.
 //   var set21 = {for (int i = 0; oracle("foo"); i++) ...[dynVar], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:88:53: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:116:53: Error: Unexpected token '...'.
 //   var list22 = [for (int i = 0; oracle("foo"); i++) ...[[42]]];
 //                                                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:88:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:116:17: Error: Unexpected token 'for'.
 //   var list22 = [for (int i = 0; oracle("foo"); i++) ...[[42]]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:89:52: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:117:52: Error: Unexpected token '...'.
 //   var set22 = {for (int i = 0; oracle("foo"); i++) ...[[42]], null};
 //                                                    ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:89:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:117:16: Error: Unexpected token 'for'.
 //   var set22 = {for (int i = 0; oracle("foo"); i++) ...[[42]], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:90:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:118:67: Error: Unexpected token '...'.
 //   var list30 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42]];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:90:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:118:53: Error: Unexpected token 'if'.
 //   var list30 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42]];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:90:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:118:17: Error: Unexpected token 'for'.
 //   var list30 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:91:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:119:66: Error: Unexpected token '...'.
 //   var set30 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42], null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:91:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:119:52: Error: Unexpected token 'if'.
 //   var set30 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42], null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:91:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:119:16: Error: Unexpected token 'for'.
 //   var set30 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:92:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:120:67: Error: Unexpected token '...'.
 //   var list31 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar]];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:92:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:120:53: Error: Unexpected token 'if'.
 //   var list31 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar]];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:92:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:120:17: Error: Unexpected token 'for'.
 //   var list31 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:93:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:121:66: Error: Unexpected token '...'.
 //   var set31 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar], null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:93:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:121:52: Error: Unexpected token 'if'.
 //   var set31 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar], null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:93:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:121:16: Error: Unexpected token 'for'.
 //   var set31 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:94:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:122:67: Error: Unexpected token '...'.
 //   var list33 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]]];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:94:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:122:53: Error: Unexpected token 'if'.
 //   var list33 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]]];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:94:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:122:17: Error: Unexpected token 'for'.
 //   var list33 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]]];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:95:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:123:66: Error: Unexpected token '...'.
 //   var set33 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]], null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:95:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:123:52: Error: Unexpected token 'if'.
 //   var set33 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]], null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:95:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:123:16: Error: Unexpected token 'for'.
 //   var set33 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]], null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:96:65: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:124:65: Error: Unexpected token '...'.
 //   List<List<int>> list40 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
 //                                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:96:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:124:29: Error: Unexpected token 'for'.
 //   List<List<int>> list40 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:97:63: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:125:63: Error: Unexpected token '...'.
 //   Set<List<int>> set40 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
 //                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:97:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:125:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set40 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:98:65: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:126:65: Error: Unexpected token '...'.
 //   List<List<int>> list41 = [for (int i = 0; oracle("foo"); i++) ...{[]}];
 //                                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:98:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:126:29: Error: Unexpected token 'for'.
 //   List<List<int>> list41 = [for (int i = 0; oracle("foo"); i++) ...{[]}];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:99:63: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:127:63: Error: Unexpected token '...'.
 //   Set<List<int>> set41 = {for (int i = 0; oracle("foo"); i++) ...{[]}, null};
 //                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:99:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:127:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set41 = {for (int i = 0; oracle("foo"); i++) ...{[]}, null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:100:79: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:128:79: Error: Unexpected token '...'.
 //   List<List<int>> list42 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:100:65: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:128:65: Error: Unexpected token 'if'.
 //   List<List<int>> list42 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                                                                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:100:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:128:29: Error: Unexpected token 'for'.
 //   List<List<int>> list42 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:101:77: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:129:77: Error: Unexpected token '...'.
 //   Set<List<int>> set42 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                                                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:101:63: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:129:63: Error: Unexpected token 'if'.
 //   Set<List<int>> set42 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                                                               ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:101:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:129:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set42 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:102:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:130:59: Error: Unexpected token '...'.
 //   List<int> list50 = [for (int i = 0; oracle("foo"); i++) ...[]];
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:102:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:130:23: Error: Unexpected token 'for'.
 //   List<int> list50 = [for (int i = 0; oracle("foo"); i++) ...[]];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:103:57: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:131:57: Error: Unexpected token '...'.
 //   Set<int> set50 = {for (int i = 0; oracle("foo"); i++) ...[], null};
 //                                                         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:103:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:131:21: Error: Unexpected token 'for'.
 //   Set<int> set50 = {for (int i = 0; oracle("foo"); i++) ...[], null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:104:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:132:59: Error: Unexpected token '...'.
 //   List<int> list51 = [for (int i = 0; oracle("foo"); i++) ...{}];
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:104:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:132:23: Error: Unexpected token 'for'.
 //   List<int> list51 = [for (int i = 0; oracle("foo"); i++) ...{}];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:105:57: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:133:57: Error: Unexpected token '...'.
 //   Set<int> set51 = {for (int i = 0; oracle("foo"); i++) ...{}, null};
 //                                                         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:105:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:133:21: Error: Unexpected token 'for'.
 //   Set<int> set51 = {for (int i = 0; oracle("foo"); i++) ...{}, null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:106:73: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:134:73: Error: Unexpected token '...'.
 //   List<int> list52 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[]];
 //                                                                         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:106:59: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:134:59: Error: Unexpected token 'if'.
 //   List<int> list52 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[]];
 //                                                           ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:106:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:134:23: Error: Unexpected token 'for'.
 //   List<int> list52 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[]];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:107:71: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:135:71: Error: Unexpected token '...'.
 //   Set<int> set52 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[], null};
 //                                                                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:107:57: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:135:57: Error: Unexpected token 'if'.
 //   Set<int> set52 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[], null};
 //                                                         ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:107:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:135:21: Error: Unexpected token 'for'.
 //   Set<int> set52 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[], null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:108:65: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:136:65: Error: Unexpected token '...'.
 //   List<List<int>> list60 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
 //                                                                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:108:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:136:29: Error: Unexpected token 'for'.
 //   List<List<int>> list60 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:109:63: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:137:63: Error: Unexpected token '...'.
 //   Set<List<int>> set60 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
 //                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:109:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:137:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set60 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:110:79: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:138:79: Error: Unexpected token '...'.
 //   List<List<int>> list61 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                                                                               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:110:65: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:138:65: Error: Unexpected token 'if'.
 //   List<List<int>> list61 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                                                                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:110:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:138:29: Error: Unexpected token 'for'.
 //   List<List<int>> list61 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:111:77: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:139:77: Error: Unexpected token '...'.
 //   Set<List<int>> set61 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                                                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:111:63: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:139:63: Error: Unexpected token 'if'.
 //   Set<List<int>> set61 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                                                               ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:111:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:139:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set61 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:112:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:140:29: Error: Unexpected token 'for'.
 //   List<List<int>> list70 = [for (int i = 0; oracle("foo"); i++) []];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:113:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:141:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set70 = {for (int i = 0; oracle("foo"); i++) [], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:114:65: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:142:65: Error: Unexpected token 'if'.
 //   List<List<int>> list71 = [for (int i = 0; oracle("foo"); i++) if (oracle()) []];
 //                                                                 ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:114:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:142:29: Error: Unexpected token 'for'.
 //   List<List<int>> list71 = [for (int i = 0; oracle("foo"); i++) if (oracle()) []];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:115:63: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:143:63: Error: Unexpected token 'if'.
 //   Set<List<int>> set71 = {for (int i = 0; oracle("foo"); i++) if (oracle()) [], null};
 //                                                               ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:115:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:143:27: Error: Unexpected token 'for'.
 //   Set<List<int>> set71 = {for (int i = 0; oracle("foo"); i++) if (oracle()) [], null};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:116:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:144:53: Error: Unexpected token 'if'.
 //   var list80 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:116:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:144:17: Error: Unexpected token 'for'.
 //   var list80 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:117:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:145:52: Error: Unexpected token 'if'.
 //   var set80 = {for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:117:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:145:16: Error: Unexpected token 'for'.
 //   var set80 = {for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:118:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:146:67: Error: Unexpected token '...'.
 //   var list81 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:118:83: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:146:83: Error: Unexpected token '...'.
 //   var list81 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble];
 //                                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:118:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:146:53: Error: Unexpected token 'if'.
 //   var list81 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:118:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:146:17: Error: Unexpected token 'for'.
 //   var list81 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:119:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:147:66: Error: Unexpected token '...'.
 //   var set81 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble, null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:119:82: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:147:82: Error: Unexpected token '...'.
 //   var set81 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble, null};
 //                                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:119:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:147:52: Error: Unexpected token 'if'.
 //   var set81 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble, null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:119:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:147:16: Error: Unexpected token 'for'.
 //   var set81 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:120:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:148:67: Error: Unexpected token '...'.
 //   var list82 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:120:83: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:148:83: Error: Unexpected token '...'.
 //   var list82 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar];
 //                                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:120:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:148:53: Error: Unexpected token 'if'.
 //   var list82 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:120:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:148:17: Error: Unexpected token 'for'.
 //   var list82 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:121:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:149:66: Error: Unexpected token '...'.
 //   var set82 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar, null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:121:82: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:149:82: Error: Unexpected token '...'.
 //   var set82 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar, null};
 //                                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:121:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:149:52: Error: Unexpected token 'if'.
 //   var set82 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar, null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:121:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:149:16: Error: Unexpected token 'for'.
 //   var set82 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:122:75: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:150:75: Error: Unexpected token '...'.
 //   var list83 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...listDouble];
 //                                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:122:53: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:150:53: Error: Unexpected token 'if'.
 //   var list83 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...listDouble];
 //                                                     ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:122:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:150:17: Error: Unexpected token 'for'.
 //   var list83 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...listDouble];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:123:66: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:151:66: Error: Unexpected token '...'.
 //   var set83 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else 3.14, null};
 //                                                                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:123:52: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:151:52: Error: Unexpected token 'if'.
 //   var set83 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else 3.14, null};
 //                                                    ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:123:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:151:16: Error: Unexpected token 'for'.
 //   var set83 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else 3.14, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:124:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:152:23: Error: Unexpected token 'for'.
 //   List<int> list90 = [for (int i = 0; oracle("foo"); i++) dynVar];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:125:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:153:21: Error: Unexpected token 'for'.
 //   Set<int> set90 = {for (int i = 0; oracle("foo"); i++) dynVar, null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:126:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:154:59: Error: Unexpected token '...'.
 //   List<int> list91 = [for (int i = 0; oracle("foo"); i++) ...dynVar];
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:126:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:154:23: Error: Unexpected token 'for'.
 //   List<int> list91 = [for (int i = 0; oracle("foo"); i++) ...dynVar];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:127:57: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:155:57: Error: Unexpected token '...'.
 //   Set<int> set91 = {for (int i = 0; oracle("foo"); i++) ...dynVar, null};
 //                                                         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:127:21: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:155:21: Error: Unexpected token 'for'.
 //   Set<int> set91 = {for (int i = 0; oracle("foo"); i++) ...dynVar, null};
 //                     ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:128:29: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:156:29: Error: Unexpected token 'for'.
 //   List<int> list100 = <int>[for (index = 0; oracle("foo"); index++) 42];
 //                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:129:27: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:157:27: Error: Unexpected token 'for'.
 //   Set<int> set100 = <int>{for (index = 0; oracle("foo"); index++) 42};
 //                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:130:18: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:158:18: Error: Unexpected token 'for'.
 //   var list110 = [for (var i in [1, 2, 3]) i];
 //                  ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:131:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:159:17: Error: Unexpected token 'for'.
 //   var set110 = {for (var i in [1, 2, 3]) i, null};
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:132:24: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:160:24: Error: Unexpected token 'for'.
 //   List<int> list120 = [for (var i in dynVar) i];
 //                        ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:133:22: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:161:22: Error: Unexpected token 'for'.
 //   Set<int> set120 = {for (var i in dynVar) i, null};
 //                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:137:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:165:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) "bar"];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:138:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:166:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) "bar", null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:139:45: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:167:45: Error: Unexpected token '...'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...["bar"]];
 //                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:139:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:167:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...["bar"]];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:140:45: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:168:45: Error: Unexpected token '...'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...["bar"], null};
 //                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:140:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:168:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...["bar"], null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:141:45: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:169:45: Error: Unexpected token '...'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...map];
 //                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:141:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:169:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...map];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:142:45: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:170:45: Error: Unexpected token '...'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...map, null};
 //                                             ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:142:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:170:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...map, null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:143:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:171:48: Error: Unexpected token 'if'.
 //   <String>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:143:12: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:171:12: Error: Unexpected token 'for'.
 //   <String>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:144:48: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:172:48: Error: Unexpected token 'if'.
 //   <String>{for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //                                                ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:144:12: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:172:12: Error: Unexpected token 'for'.
 //   <String>{for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //            ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:145:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:173:59: Error: Unexpected token '...'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42];
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:145:45: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:173:45: Error: Unexpected token 'if'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42];
 //                                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:145:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:173:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:146:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:174:59: Error: Unexpected token '...'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:146:45: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:174:45: Error: Unexpected token 'if'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:146:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:174:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:147:67: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:175:67: Error: Unexpected token '...'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...map];
 //                                                                   ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:147:45: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:175:45: Error: Unexpected token 'if'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...map];
 //                                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:147:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:175:9: Error: Unexpected token 'for'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...map];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:148:59: Error: Unexpected token '...'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:176:59: Error: Unexpected token '...'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                                           ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:148:45: Error: Unexpected token 'if'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:176:45: Error: Unexpected token 'if'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                             ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:148:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:176:9: Error: Unexpected token 'for'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:151:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:179:9: Error: Unexpected token 'for'.
 //   <int>[for (i in <int>[1]) i];
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:152:9: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:180:9: Error: Unexpected token 'for'.
 //   <int>{for (i in <int>[1]) i, null};
 //         ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:154:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:182:17: Error: Unexpected token 'for'.
 //   var list10 = [for (var i in "not iterable") i];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:155:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:183:16: Error: Unexpected token 'for'.
 //   var set10 = {for (var i in "not iterable") i, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:156:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:184:17: Error: Unexpected token 'for'.
 //   var list20 = [for (int i in ["not", "int"]) i];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:157:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:185:16: Error: Unexpected token 'for'.
 //   var set20 = {for (int i in ["not", "int"]) i, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:158:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:186:23: Error: Unexpected token 'for'.
 //   var list30 = [await for (var i in "not stream") i];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:159:22: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:187:22: Error: Unexpected token 'for'.
 //   var set30 = {await for (var i in "not stream") i, null};
 //                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:160:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:188:23: Error: Unexpected token 'for'.
 //   var list40 = [await for (int i in Stream.fromIterable(["not", "int"])) i];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:161:22: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:189:22: Error: Unexpected token 'for'.
 //   var set40 = {await for (int i in Stream.fromIterable(["not", "int"])) i, null};
 //                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:162:17: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:190:17: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
 // Try removing the keyword, or use a for-each statement.
 //   var list50 = [await for (;;) 42];
 //                 ^^^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:162:23: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:190:23: Error: Unexpected token 'for'.
 //   var list50 = [await for (;;) 42];
 //                       ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:163:16: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:191:16: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
 // Try removing the keyword, or use a for-each statement.
 //   var set50 = {await for (;;) 42, null};
 //                ^^^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:163:22: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:191:22: Error: Unexpected token 'for'.
 //   var set50 = {await for (;;) 42, null};
 //                      ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:164:17: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:192:17: Error: Unexpected token 'for'.
 //   var list60 = [for (; "not bool";) 42];
 //                 ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:165:16: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:193:16: Error: Unexpected token 'for'.
 //   var set60 = {for (; "not bool";) 42, null};
 //                ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:169:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:197:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
 // Try marking the function body with either 'async' or 'async*', or removing the 'await' before the for loop.
 //   <int>[await for (int i in stream) i];
 //                          ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:169:15: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:197:15: Error: Unexpected token 'for'.
 //   <int>[await for (int i in stream) i];
 //               ^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:170:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:198:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
 // Try marking the function body with either 'async' or 'async*', or removing the 'await' before the for loop.
 //   <int>{await for (int i in stream) i};
 //                          ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:170:15: Error: Unexpected token 'for'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:198:15: Error: Unexpected token 'for'.
 //   <int>{await for (int i in stream) i};
 //               ^^^
 //
@@ -1164,71 +1388,98 @@ import "dart:async" as asy;
 
 static method oracle<T extends core::Object = dynamic>([self::oracle::T t = null]) → dynamic
   return true;
-static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble) → dynamic {
+static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble, core::Map<core::String, core::int> mapToInt, core::Map<core::String, core::double> mapToDouble) → dynamic {
   dynamic list10 = <dynamic>[];
   dynamic set10 = <dynamic>{null};
+  dynamic map10 = <dynamic, dynamic>{"baz": null};
   dynamic list11 = <dynamic>[];
   dynamic set11 = <dynamic>{null};
+  dynamic map11 = <dynamic, dynamic>{"baz": null};
   dynamic list12 = <dynamic>[];
   dynamic set12 = <dynamic>{null};
+  dynamic map12 = <dynamic, dynamic>{"baz": null};
   dynamic list20 = <dynamic>[];
   dynamic set20 = <dynamic>{null};
+  dynamic map20 = <dynamic, dynamic>{"baz": null};
   dynamic list21 = <dynamic>[];
   dynamic set21 = <dynamic>{null};
+  dynamic map21 = <dynamic, dynamic>{"baz": null};
   dynamic list22 = <dynamic>[];
   dynamic set22 = <dynamic>{null};
+  dynamic map22 = <dynamic, dynamic>{"baz": null};
   dynamic list30 = <dynamic>[];
   dynamic set30 = <dynamic>{null};
+  dynamic map30 = <dynamic, dynamic>{"baz": null};
   dynamic list31 = <dynamic>[];
   dynamic set31 = <dynamic>{null};
+  dynamic map31 = <dynamic, dynamic>{"baz": null};
   dynamic list33 = <dynamic>[];
   dynamic set33 = <dynamic>{null};
+  dynamic map33 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list40 = <dynamic>[];
   core::Set<core::List<core::int>> set40 = <dynamic>{null};
+  core::Map<core::String, core::List<core::int>> map40 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list41 = <dynamic>[];
   core::Set<core::List<core::int>> set41 = <dynamic>{null};
   core::List<core::List<core::int>> list42 = <dynamic>[];
   core::Set<core::List<core::int>> set42 = <dynamic>{null};
+  core::Map<core::String, core::List<core::int>> map42 = <dynamic, dynamic>{"baz": null};
   core::List<core::int> list50 = <dynamic>[];
   core::Set<core::int> set50 = <dynamic>{null};
+  core::Map<dynamic, dynamic> map50 = <dynamic, dynamic>{"baz": null};
   core::List<core::int> list51 = <dynamic>[];
   core::Set<core::int> set51 = <dynamic>{null};
   core::List<core::int> list52 = <dynamic>[];
   core::Set<core::int> set52 = <dynamic>{null};
+  core::Map<core::String, core::int> map52 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list60 = <dynamic>[];
   core::Set<core::List<core::int>> set60 = <dynamic>{null};
+  core::Map<core::String, core::List<core::int>> map60 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list61 = <dynamic>[];
   core::Set<core::List<core::int>> set61 = <dynamic>{null};
+  core::Map<core::String, core::List<core::int>> map61 = <dynamic, dynamic>{"baz": null};
   core::List<core::List<core::int>> list70 = <dynamic>[];
   core::Set<core::List<core::int>> set70 = <dynamic>{null};
   core::List<core::List<core::int>> list71 = <dynamic>[];
   core::Set<core::List<core::int>> set71 = <dynamic>{null};
   dynamic list80 = <dynamic>[];
   dynamic set80 = <dynamic>{null};
+  dynamic map80 = <dynamic, dynamic>{"baz": null};
   dynamic list81 = <dynamic>[];
   dynamic set81 = <dynamic>{null};
+  dynamic map81 = <dynamic>{null};
   dynamic list82 = <dynamic>[];
   dynamic set82 = <dynamic>{null};
+  dynamic map82 = <dynamic>{null};
   dynamic list83 = <dynamic>[];
   dynamic set83 = <dynamic>{null};
+  dynamic map83 = <dynamic>{null};
   core::List<core::int> list90 = <dynamic>[];
   core::Set<core::int> set90 = <dynamic>{null};
+  core::Map<core::String, core::int> map90 = <dynamic, dynamic>{"baz": null};
   core::List<core::int> list91 = <dynamic>[];
   core::Set<core::int> set91 = <dynamic>{null};
+  core::Map<core::String, core::int> map91 = <dynamic, dynamic>{"baz": null};
 }
 static method testIfElementErrors(core::Map<core::int, core::int> map) → dynamic {
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
   <core::String>[];
   <core::String>{null};
+  <core::String, core::String>{"baz": null};
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
   <core::int>[];
   <core::int>{null};
+  <core::String, core::int>{"baz": null};
 }
 static method testForElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble, core::int index) → dynamic {
   dynamic list10 = <dynamic>[];
diff --git a/pkg/front_end/testcases/control_flow_collection_inference.dart.outline.expect b/pkg/front_end/testcases/control_flow_collection_inference.dart.outline.expect
index db2b93c105ad..e6a13d19dc87 100644
--- a/pkg/front_end/testcases/control_flow_collection_inference.dart.outline.expect
+++ b/pkg/front_end/testcases/control_flow_collection_inference.dart.outline.expect
@@ -5,7 +5,7 @@ import "dart:async" as asy;
 
 static method oracle<T extends core::Object = dynamic>([self::oracle::T t]) → dynamic
   ;
-static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble) → dynamic
+static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble, core::Map<core::String, core::int> mapToInt, core::Map<core::String, core::double> mapToDouble) → dynamic
   ;
 static method testIfElementErrors(core::Map<core::int, core::int> map) → dynamic
   ;
diff --git a/pkg/front_end/testcases/control_flow_collection_inference.dart.strong.expect b/pkg/front_end/testcases/control_flow_collection_inference.dart.strong.expect
index ac144bcd4f27..7c6cb4631eae 100644
--- a/pkg/front_end/testcases/control_flow_collection_inference.dart.strong.expect
+++ b/pkg/front_end/testcases/control_flow_collection_inference.dart.strong.expect
@@ -2,220 +2,317 @@ library;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:62:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:21:16: Error: Expected ':' after this.
+//   var map20 = {if (oracle("foo")) ...{"bar": 42}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:24:16: Error: Expected ':' after this.
+//   var map21 = {if (oracle("foo")) ...{"bar": dynVar}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:27:16: Error: Expected ':' after this.
+//   var map22 = {if (oracle("foo")) ...{"bar": [42]}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:30:16: Error: Expected ':' after this.
+//   var map30 = {if (oracle("foo")) if (oracle()) ...{"bar": 42}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:33:16: Error: Expected ':' after this.
+//   var map31 = {if (oracle("foo")) if (oracle()) ...{"bar": dynVar}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:36:16: Error: Expected ':' after this.
+//   var map33 = {if (oracle("foo")) if (oracle()) ...{"bar": [42]}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:39:35: Error: Expected ':' after this.
+//   Map<String, List<int>> map40 = {if (oracle("foo")) ...{"bar", []}, "baz": null};
+//                                   ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:44:35: Error: Expected ':' after this.
+//   Map<String, List<int>> map42 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                   ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:3: Error: Expected 2 type arguments.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:21: Error: Expected ':' after this.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//                     ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:52:29: Error: Expected ':' after this.
+//   Map<String, int> map52 = {if (oracle("foo")) if (oracle()) ...{}, "baz": null};
+//                             ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:55:35: Error: Expected ':' after this.
+//   Map<String, List<int>> map60 = {if (oracle("foo")) ...{"bar": []}, "baz": null};
+//                                   ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:58:35: Error: Expected ':' after this.
+//   Map<String, List<int>> map61 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                   ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:80:29: Error: Expected ':' after this.
+//   Map<String, int> map91 = {if (oracle("foo")) ...dynVar, "baz": null};
+//                             ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:38: Error: Unexpected type 'Map<String, double>' of a spread.  Expected 'dynamic' or an Iterable.
+//  - 'Map' is from 'dart:core'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                                      ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:55: Error: Unexpected type 'Map<String, double>' of a spread.  Expected 'dynamic' or an Iterable.
+//  - 'Map' is from 'dart:core'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                                                       ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:74:38: Error: Unexpected type 'Map<String, int>' of a spread.  Expected 'dynamic' or an Iterable.
+//  - 'Map' is from 'dart:core'.
+//   var map83 = {if (oracle("foo")) ...mapToInt else 3.14, null};
+//                                      ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:89:17: Error: Expected ':' after this.
+//   <String, int>{if (oracle("foo")) ...{"bar": "bar"}, "baz": null};
+//                 ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:92:17: Error: Expected ':' after this.
+//   <String, int>{if (oracle("foo")) ...["bar"], "baz": null};
+//                 ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:98:17: Error: Expected ':' after this.
+//   <String, int>{if (oracle("foo")) ...[42] else {"bar": 42}, "baz": null};
+//                 ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:101:17: Error: Expected ':' after this.
+//   <String, int>{if (oracle("foo")) {"bar": 42} else ...[42], "baz": null};
+//                 ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:84:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>[if (oracle("foo")) "bar"];
 //                            ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:63:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:85:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>{if (oracle("foo")) "bar", null};
 //                            ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:64:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:86:41: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   <String, int>{if (oracle("foo")) "bar": "bar", "baz": null};
+//                                         ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:87:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>[if (oracle("foo")) ...["bar"]];
 //                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:65:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:88:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>{if (oracle("foo")) ...["bar"], null};
 //                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:66:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:90:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[if (oracle("foo")) ...map];
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:67:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:91:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{if (oracle("foo")) ...map, null};
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:68:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:93:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   <String>[if (oracle("foo")) 42 else 3.14];
 //            ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:69:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:94:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   <String>{if (oracle("foo")) 42 else 3.14, null};
 //            ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:70:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:95:20: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   <String, String>{if (oracle("foo")) "bar": 42 else "baz": 3.14, "baz": null};
+//                    ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:96:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[if (oracle("foo")) ...map else 42];
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:71:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:97:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:72:39: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:99:39: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[if (oracle("foo")) 42 else ...map];
 //                                       ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:73:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:100:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:151:14: Error: Setter not found: 'i'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:179:14: Error: Setter not found: 'i'.
 //   <int>[for (i in <int>[1]) i];
 //              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:152:14: Error: Setter not found: 'i'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:180:14: Error: Setter not found: 'i'.
 //   <int>{for (i in <int>[1]) i, null};
 //              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:162:17: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:190:17: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
 // Try removing the keyword, or use a for-each statement.
 //   var list50 = [await for (;;) 42];
 //                 ^^^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:163:16: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:191:16: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
 // Try removing the keyword, or use a for-each statement.
 //   var set50 = {await for (;;) 42, null};
 //                ^^^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:137:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:165:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>[for (int i = 0; oracle("foo"); i++) "bar"];
 //                                             ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:138:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:166:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>{for (int i = 0; oracle("foo"); i++) "bar", null};
 //                                             ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:139:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:167:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...["bar"]];
 //                                                 ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:140:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:168:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...["bar"], null};
 //                                                 ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:141:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:169:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...map];
 //                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:142:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:170:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...map, null};
 //                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:143:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:171:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   <String>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:144:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:172:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   <String>{for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:145:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:173:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42];
 //                                                              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:146:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:174:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                                              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:147:70: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:175:70: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...map];
 //                                                                      ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:148:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:176:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                                              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:154:31: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:182:31: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
 //  - 'Iterable' is from 'dart:core'.
 //   var list10 = [for (var i in "not iterable") i];
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:155:30: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:183:30: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
 //  - 'Iterable' is from 'dart:core'.
 //   var set10 = {for (var i in "not iterable") i, null};
 //                              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:156:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:184:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var list20 = [for (int i in ["not", "int"]) i];
 //                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:156:39: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:184:39: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var list20 = [for (int i in ["not", "int"]) i];
 //                                       ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:157:31: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:185:31: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var set20 = {for (int i in ["not", "int"]) i, null};
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:157:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:185:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var set20 = {for (int i in ["not", "int"]) i, null};
 //                                      ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:158:37: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:186:37: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
 //  - 'Stream' is from 'dart:async'.
 //   var list30 = [await for (var i in "not stream") i];
 //                                     ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:159:36: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:187:36: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
 //  - 'Stream' is from 'dart:async'.
 //   var set30 = {await for (var i in "not stream") i, null};
 //                                    ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:160:58: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:188:58: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var list40 = [await for (int i in Stream.fromIterable(["not", "int"])) i];
 //                                                          ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:160:65: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:188:65: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var list40 = [await for (int i in Stream.fromIterable(["not", "int"])) i];
 //                                                                 ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:161:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:189:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var set40 = {await for (int i in Stream.fromIterable(["not", "int"])) i, null};
 //                                                         ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:161:64: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:189:64: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var set40 = {await for (int i in Stream.fromIterable(["not", "int"])) i, null};
 //                                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:164:24: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:192:24: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
 // Try changing the type of the left hand side, or casting the right hand side to 'bool'.
 //   var list60 = [for (; "not bool";) 42];
 //                        ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:165:23: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:193:23: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
 // Try changing the type of the left hand side, or casting the right hand side to 'bool'.
 //   var set60 = {for (; "not bool";) 42, null};
 //                       ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:169:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:197:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
 // Try marking the function body with either 'async' or 'async*', or removing the 'await' before the for loop.
 //   <int>[await for (int i in stream) i];
 //                          ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:170:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:198:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
 // Try marking the function body with either 'async' or 'async*', or removing the 'await' before the for loop.
 //   <int>{await for (int i in stream) i};
 //                          ^^
@@ -227,7 +324,7 @@ import "dart:async" as asy;
 
 static method oracle<T extends core::Object = dynamic>([self::oracle::T t = null]) → dynamic
   return true;
-static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble) → dynamic {
+static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble, core::Map<core::String, core::int> mapToInt, core::Map<core::String, core::double> mapToDouble) → dynamic {
   core::List<core::int> list10 = block {
     final core::List<core::int> #t1 = <core::int>[];
     if(self::oracle<core::String>("foo"))
@@ -239,1062 +336,1154 @@ static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core:
       #t2.{core::Set::add}(42);
     #t2.{core::Set::add}(null);
   } =>#t2;
-  core::List<dynamic> list11 = block {
-    final core::List<dynamic> #t3 = <dynamic>[];
+  core::Map<core::String, core::int> map10 = block {
+    final core::Map<core::String, core::int> #t3 = <core::String, core::int>{};
     if(self::oracle<core::String>("foo"))
-      #t3.{core::List::add}(dynVar);
+      #t3.{core::Map::[]=}("bar", 42);
+    #t3.{core::Map::[]=}("baz", null);
   } =>#t3;
-  core::Set<dynamic> set11 = block {
-    final core::Set<dynamic> #t4 = col::LinkedHashSet::•<dynamic>();
+  core::List<dynamic> list11 = block {
+    final core::List<dynamic> #t4 = <dynamic>[];
     if(self::oracle<core::String>("foo"))
-      #t4.{core::Set::add}(dynVar);
-    #t4.{core::Set::add}(null);
+      #t4.{core::List::add}(dynVar);
   } =>#t4;
-  core::List<core::List<core::int>> list12 = block {
-    final core::List<core::List<core::int>> #t5 = <core::List<core::int>>[];
+  core::Set<dynamic> set11 = block {
+    final core::Set<dynamic> #t5 = col::LinkedHashSet::•<dynamic>();
     if(self::oracle<core::String>("foo"))
-      #t5.{core::List::add}(<core::int>[42]);
+      #t5.{core::Set::add}(dynVar);
+    #t5.{core::Set::add}(null);
   } =>#t5;
-  core::Set<core::List<core::int>> set12 = block {
-    final core::Set<core::List<core::int>> #t6 = col::LinkedHashSet::•<core::List<core::int>>();
+  core::Map<core::String, dynamic> map11 = block {
+    final core::Map<core::String, dynamic> #t6 = <core::String, dynamic>{};
     if(self::oracle<core::String>("foo"))
-      #t6.{core::Set::add}(<core::int>[42]);
-    #t6.{core::Set::add}(null);
+      #t6.{core::Map::[]=}("bar", dynVar);
+    #t6.{core::Map::[]=}("baz", null);
   } =>#t6;
-  core::List<core::int> list20 = block {
-    final core::List<core::int> #t7 = <core::int>[];
+  core::List<core::List<core::int>> list12 = block {
+    final core::List<core::List<core::int>> #t7 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t8 in <core::int>[42])
-        #t7.{core::List::add}(#t8);
+      #t7.{core::List::add}(<core::int>[42]);
   } =>#t7;
-  core::Set<core::int> set20 = block {
-    final core::Set<core::int> #t9 = col::LinkedHashSet::•<core::int>();
+  core::Set<core::List<core::int>> set12 = block {
+    final core::Set<core::List<core::int>> #t8 = col::LinkedHashSet::•<core::List<core::int>>();
+    if(self::oracle<core::String>("foo"))
+      #t8.{core::Set::add}(<core::int>[42]);
+    #t8.{core::Set::add}(null);
+  } =>#t8;
+  core::Map<core::String, core::List<core::int>> map12 = block {
+    final core::Map<core::String, core::List<core::int>> #t9 = <core::String, core::List<core::int>>{};
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t10 in <core::int>[42])
-        #t9.{core::Set::add}(#t10);
-    #t9.{core::Set::add}(null);
+      #t9.{core::Map::[]=}("bar", <core::int>[42]);
+    #t9.{core::Map::[]=}("baz", null);
   } =>#t9;
+  core::List<core::int> list20 = block {
+    final core::List<core::int> #t10 = <core::int>[];
+    if(self::oracle<core::String>("foo"))
+      for (final core::int #t11 in <core::int>[42])
+        #t10.{core::List::add}(#t11);
+  } =>#t10;
+  core::Set<core::int> set20 = block {
+    final core::Set<core::int> #t12 = col::LinkedHashSet::•<core::int>();
+    if(self::oracle<core::String>("foo"))
+      for (final core::int #t13 in <core::int>[42])
+        #t12.{core::Set::add}(#t13);
+    #t12.{core::Set::add}(null);
+  } =>#t12;
+  core::Map<core::String, core::Null> map20 = <core::String, core::Null>{"baz": null};
   core::List<dynamic> list21 = block {
-    final core::List<dynamic> #t11 = <dynamic>[];
+    final core::List<dynamic> #t14 = <dynamic>[];
     if(self::oracle<core::String>("foo"))
-      for (final dynamic #t12 in <dynamic>[dynVar])
-        #t11.{core::List::add}(#t12);
-  } =>#t11;
+      for (final dynamic #t15 in <dynamic>[dynVar])
+        #t14.{core::List::add}(#t15);
+  } =>#t14;
   core::Set<dynamic> set21 = block {
-    final core::Set<dynamic> #t13 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t16 = col::LinkedHashSet::•<dynamic>();
     if(self::oracle<core::String>("foo"))
-      for (final dynamic #t14 in <dynamic>[dynVar])
-        #t13.{core::Set::add}(#t14);
-    #t13.{core::Set::add}(null);
-  } =>#t13;
+      for (final dynamic #t17 in <dynamic>[dynVar])
+        #t16.{core::Set::add}(#t17);
+    #t16.{core::Set::add}(null);
+  } =>#t16;
+  core::Map<core::String, core::Null> map21 = <core::String, core::Null>{"baz": null};
   core::List<core::List<core::int>> list22 = block {
-    final core::List<core::List<core::int>> #t15 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t18 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t16 in <core::List<core::int>>[<core::int>[42]])
-        #t15.{core::List::add}(#t16);
-  } =>#t15;
+      for (final core::List<core::int> #t19 in <core::List<core::int>>[<core::int>[42]])
+        #t18.{core::List::add}(#t19);
+  } =>#t18;
   core::Set<core::List<core::int>> set22 = block {
-    final core::Set<core::List<core::int>> #t17 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t20 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t18 in <core::List<core::int>>[<core::int>[42]])
-        #t17.{core::Set::add}(#t18);
-    #t17.{core::Set::add}(null);
-  } =>#t17;
+      for (final core::List<core::int> #t21 in <core::List<core::int>>[<core::int>[42]])
+        #t20.{core::Set::add}(#t21);
+    #t20.{core::Set::add}(null);
+  } =>#t20;
+  core::Map<core::String, core::Null> map22 = <core::String, core::Null>{"baz": null};
   core::List<core::int> list30 = block {
-    final core::List<core::int> #t19 = <core::int>[];
+    final core::List<core::int> #t22 = <core::int>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::int #t20 in <core::int>[42])
-          #t19.{core::List::add}(#t20);
-  } =>#t19;
+        for (final core::int #t23 in <core::int>[42])
+          #t22.{core::List::add}(#t23);
+  } =>#t22;
   core::Set<core::int> set30 = block {
-    final core::Set<core::int> #t21 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t24 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::int #t22 in <core::int>[42])
-          #t21.{core::Set::add}(#t22);
-    #t21.{core::Set::add}(null);
-  } =>#t21;
+        for (final core::int #t25 in <core::int>[42])
+          #t24.{core::Set::add}(#t25);
+    #t24.{core::Set::add}(null);
+  } =>#t24;
+  core::Map<core::String, core::Null> map30 = <core::String, core::Null>{"baz": null};
   core::List<dynamic> list31 = block {
-    final core::List<dynamic> #t23 = <dynamic>[];
+    final core::List<dynamic> #t26 = <dynamic>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final dynamic #t24 in <dynamic>[dynVar])
-          #t23.{core::List::add}(#t24);
-  } =>#t23;
+        for (final dynamic #t27 in <dynamic>[dynVar])
+          #t26.{core::List::add}(#t27);
+  } =>#t26;
   core::Set<dynamic> set31 = block {
-    final core::Set<dynamic> #t25 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t28 = col::LinkedHashSet::•<dynamic>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final dynamic #t26 in <dynamic>[dynVar])
-          #t25.{core::Set::add}(#t26);
-    #t25.{core::Set::add}(null);
-  } =>#t25;
+        for (final dynamic #t29 in <dynamic>[dynVar])
+          #t28.{core::Set::add}(#t29);
+    #t28.{core::Set::add}(null);
+  } =>#t28;
+  core::Map<core::String, core::Null> map31 = <core::String, core::Null>{"baz": null};
   core::List<core::List<core::int>> list33 = block {
-    final core::List<core::List<core::int>> #t27 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t30 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t28 in <core::List<core::int>>[<core::int>[42]])
-          #t27.{core::List::add}(#t28);
-  } =>#t27;
+        for (final core::List<core::int> #t31 in <core::List<core::int>>[<core::int>[42]])
+          #t30.{core::List::add}(#t31);
+  } =>#t30;
   core::Set<core::List<core::int>> set33 = block {
-    final core::Set<core::List<core::int>> #t29 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t32 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t30 in <core::List<core::int>>[<core::int>[42]])
-          #t29.{core::Set::add}(#t30);
-    #t29.{core::Set::add}(null);
-  } =>#t29;
+        for (final core::List<core::int> #t33 in <core::List<core::int>>[<core::int>[42]])
+          #t32.{core::Set::add}(#t33);
+    #t32.{core::Set::add}(null);
+  } =>#t32;
+  core::Map<core::String, core::Null> map33 = <core::String, core::Null>{"baz": null};
   core::List<core::List<core::int>> list40 = block {
-    final core::List<core::List<core::int>> #t31 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t34 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t32 in <core::List<core::int>>[<core::int>[]])
-        #t31.{core::List::add}(#t32);
-  } =>#t31;
+      for (final core::List<core::int> #t35 in <core::List<core::int>>[<core::int>[]])
+        #t34.{core::List::add}(#t35);
+  } =>#t34;
   core::Set<core::List<core::int>> set40 = block {
-    final core::Set<core::List<core::int>> #t33 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t36 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t34 in <core::List<core::int>>[<core::int>[]])
-        #t33.{core::Set::add}(#t34);
-    #t33.{core::Set::add}(null);
-  } =>#t33;
+      for (final core::List<core::int> #t37 in <core::List<core::int>>[<core::int>[]])
+        #t36.{core::Set::add}(#t37);
+    #t36.{core::Set::add}(null);
+  } =>#t36;
+  core::Map<core::String, core::List<core::int>> map40 = <core::String, core::List<core::int>>{"baz": null};
   core::List<core::List<core::int>> list41 = block {
-    final core::List<core::List<core::int>> #t35 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t38 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t36 in let final core::Set<core::List<core::int>> #t37 = col::LinkedHashSet::•<core::List<core::int>>() in let final dynamic #t38 = #t37.{core::Set::add}(<core::int>[]) in #t37)
-        #t35.{core::List::add}(#t36);
-  } =>#t35;
+      for (final core::List<core::int> #t39 in let final core::Set<core::List<core::int>> #t40 = col::LinkedHashSet::•<core::List<core::int>>() in let final dynamic #t41 = #t40.{core::Set::add}(<core::int>[]) in #t40)
+        #t38.{core::List::add}(#t39);
+  } =>#t38;
   core::Set<core::List<core::int>> set41 = block {
-    final core::Set<core::List<core::int>> #t39 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t42 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t40 in let final core::Set<core::List<core::int>> #t41 = col::LinkedHashSet::•<core::List<core::int>>() in let final dynamic #t42 = #t41.{core::Set::add}(<core::int>[]) in #t41)
-        #t39.{core::Set::add}(#t40);
-    #t39.{core::Set::add}(null);
-  } =>#t39;
+      for (final core::List<core::int> #t43 in let final core::Set<core::List<core::int>> #t44 = col::LinkedHashSet::•<core::List<core::int>>() in let final dynamic #t45 = #t44.{core::Set::add}(<core::int>[]) in #t44)
+        #t42.{core::Set::add}(#t43);
+    #t42.{core::Set::add}(null);
+  } =>#t42;
   core::List<core::List<core::int>> list42 = block {
-    final core::List<core::List<core::int>> #t43 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t46 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t44 in <core::List<core::int>>[<core::int>[]])
-          #t43.{core::List::add}(#t44);
-  } =>#t43;
+        for (final core::List<core::int> #t47 in <core::List<core::int>>[<core::int>[]])
+          #t46.{core::List::add}(#t47);
+  } =>#t46;
   core::Set<core::List<core::int>> set42 = block {
-    final core::Set<core::List<core::int>> #t45 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t48 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t46 in <core::List<core::int>>[<core::int>[]])
-          #t45.{core::Set::add}(#t46);
-    #t45.{core::Set::add}(null);
-  } =>#t45;
+        for (final core::List<core::int> #t49 in <core::List<core::int>>[<core::int>[]])
+          #t48.{core::Set::add}(#t49);
+    #t48.{core::Set::add}(null);
+  } =>#t48;
+  core::Map<core::String, core::List<core::int>> map42 = <core::String, core::List<core::int>>{"baz": null};
   core::List<core::int> list50 = block {
-    final core::List<core::int> #t47 = <core::int>[];
+    final core::List<core::int> #t50 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t48 in <core::int>[])
-        #t47.{core::List::add}(#t48);
-  } =>#t47;
+      for (final core::int #t51 in <core::int>[])
+        #t50.{core::List::add}(#t51);
+  } =>#t50;
   core::Set<core::int> set50 = block {
-    final core::Set<core::int> #t49 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t52 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t50 in <core::int>[])
-        #t49.{core::Set::add}(#t50);
-    #t49.{core::Set::add}(null);
-  } =>#t49;
+      for (final core::int #t53 in <core::int>[])
+        #t52.{core::Set::add}(#t53);
+    #t52.{core::Set::add}(null);
+  } =>#t52;
+  core::Map<dynamic, dynamic> map50 = <dynamic, dynamic>{"baz": null};
   core::List<core::int> list51 = block {
-    final core::List<core::int> #t51 = <core::int>[];
-    if(self::oracle<core::String>("foo"))
-      for (final core::int #t52 in let final core::Set<core::int> #t53 = col::LinkedHashSet::•<core::int>() in #t53)
-        #t51.{core::List::add}(#t52);
-  } =>#t51;
-  core::Set<core::int> set51 = block {
-    final core::Set<core::int> #t54 = col::LinkedHashSet::•<core::int>();
+    final core::List<core::int> #t54 = <core::int>[];
     if(self::oracle<core::String>("foo"))
       for (final core::int #t55 in let final core::Set<core::int> #t56 = col::LinkedHashSet::•<core::int>() in #t56)
-        #t54.{core::Set::add}(#t55);
-    #t54.{core::Set::add}(null);
+        #t54.{core::List::add}(#t55);
   } =>#t54;
+  core::Set<core::int> set51 = block {
+    final core::Set<core::int> #t57 = col::LinkedHashSet::•<core::int>();
+    if(self::oracle<core::String>("foo"))
+      for (final core::int #t58 in let final core::Set<core::int> #t59 = col::LinkedHashSet::•<core::int>() in #t59)
+        #t57.{core::Set::add}(#t58);
+    #t57.{core::Set::add}(null);
+  } =>#t57;
   core::List<core::int> list52 = block {
-    final core::List<core::int> #t57 = <core::int>[];
+    final core::List<core::int> #t60 = <core::int>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::int #t58 in <core::int>[])
-          #t57.{core::List::add}(#t58);
-  } =>#t57;
+        for (final core::int #t61 in <core::int>[])
+          #t60.{core::List::add}(#t61);
+  } =>#t60;
   core::Set<core::int> set52 = block {
-    final core::Set<core::int> #t59 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t62 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::int #t60 in <core::int>[])
-          #t59.{core::Set::add}(#t60);
-    #t59.{core::Set::add}(null);
-  } =>#t59;
+        for (final core::int #t63 in <core::int>[])
+          #t62.{core::Set::add}(#t63);
+    #t62.{core::Set::add}(null);
+  } =>#t62;
+  core::Map<core::String, core::int> map52 = <core::String, core::int>{"baz": null};
   core::List<core::List<core::int>> list60 = block {
-    final core::List<core::List<core::int>> #t61 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t64 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t62 in <core::List<core::int>>[<core::int>[]])
-        #t61.{core::List::add}(#t62);
-  } =>#t61;
+      for (final core::List<core::int> #t65 in <core::List<core::int>>[<core::int>[]])
+        #t64.{core::List::add}(#t65);
+  } =>#t64;
   core::Set<core::List<core::int>> set60 = block {
-    final core::Set<core::List<core::int>> #t63 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t66 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t64 in <core::List<core::int>>[<core::int>[]])
-        #t63.{core::Set::add}(#t64);
-    #t63.{core::Set::add}(null);
-  } =>#t63;
+      for (final core::List<core::int> #t67 in <core::List<core::int>>[<core::int>[]])
+        #t66.{core::Set::add}(#t67);
+    #t66.{core::Set::add}(null);
+  } =>#t66;
+  core::Map<core::String, core::List<core::int>> map60 = <core::String, core::List<core::int>>{"baz": null};
   core::List<core::List<core::int>> list61 = block {
-    final core::List<core::List<core::int>> #t65 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t68 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t66 in <core::List<core::int>>[<core::int>[]])
-          #t65.{core::List::add}(#t66);
-  } =>#t65;
+        for (final core::List<core::int> #t69 in <core::List<core::int>>[<core::int>[]])
+          #t68.{core::List::add}(#t69);
+  } =>#t68;
   core::Set<core::List<core::int>> set61 = block {
-    final core::Set<core::List<core::int>> #t67 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t70 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t68 in <core::List<core::int>>[<core::int>[]])
-          #t67.{core::Set::add}(#t68);
-    #t67.{core::Set::add}(null);
-  } =>#t67;
+        for (final core::List<core::int> #t71 in <core::List<core::int>>[<core::int>[]])
+          #t70.{core::Set::add}(#t71);
+    #t70.{core::Set::add}(null);
+  } =>#t70;
+  core::Map<core::String, core::List<core::int>> map61 = <core::String, core::List<core::int>>{"baz": null};
   core::List<core::List<core::int>> list70 = block {
-    final core::List<core::List<core::int>> #t69 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t72 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      #t69.{core::List::add}(<core::int>[]);
-  } =>#t69;
+      #t72.{core::List::add}(<core::int>[]);
+  } =>#t72;
   core::Set<core::List<core::int>> set70 = block {
-    final core::Set<core::List<core::int>> #t70 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t73 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      #t70.{core::Set::add}(<core::int>[]);
-    #t70.{core::Set::add}(null);
-  } =>#t70;
+      #t73.{core::Set::add}(<core::int>[]);
+    #t73.{core::Set::add}(null);
+  } =>#t73;
   core::List<core::List<core::int>> list71 = block {
-    final core::List<core::List<core::int>> #t71 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t74 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        #t71.{core::List::add}(<core::int>[]);
-  } =>#t71;
+        #t74.{core::List::add}(<core::int>[]);
+  } =>#t74;
   core::Set<core::List<core::int>> set71 = block {
-    final core::Set<core::List<core::int>> #t72 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t75 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        #t72.{core::Set::add}(<core::int>[]);
-    #t72.{core::Set::add}(null);
-  } =>#t72;
+        #t75.{core::Set::add}(<core::int>[]);
+    #t75.{core::Set::add}(null);
+  } =>#t75;
   core::List<core::num> list80 = block {
-    final core::List<core::num> #t73 = <core::num>[];
+    final core::List<core::num> #t76 = <core::num>[];
     if(self::oracle<core::String>("foo"))
-      #t73.{core::List::add}(42);
+      #t76.{core::List::add}(42);
     else
-      #t73.{core::List::add}(3.14);
-  } =>#t73;
+      #t76.{core::List::add}(3.14);
+  } =>#t76;
   core::Set<core::num> set80 = block {
-    final core::Set<core::num> #t74 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t77 = col::LinkedHashSet::•<core::num>();
     if(self::oracle<core::String>("foo"))
-      #t74.{core::Set::add}(42);
+      #t77.{core::Set::add}(42);
     else
-      #t74.{core::Set::add}(3.14);
-    #t74.{core::Set::add}(null);
-  } =>#t74;
+      #t77.{core::Set::add}(3.14);
+    #t77.{core::Set::add}(null);
+  } =>#t77;
+  core::Map<core::String, core::num> map80 = block {
+    final core::Map<core::String, core::num> #t78 = <core::String, core::num>{};
+    if(self::oracle<core::String>("foo"))
+      #t78.{core::Map::[]=}("bar", 42);
+    else
+      #t78.{core::Map::[]=}("bar", 3.14);
+    #t78.{core::Map::[]=}("baz", null);
+  } =>#t78;
   core::List<core::num> list81 = block {
-    final core::List<core::num> #t75 = <core::num>[];
+    final core::List<core::num> #t79 = <core::num>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::num #t76 in listInt)
-        #t75.{core::List::add}(#t76);
+      for (final core::num #t80 in listInt)
+        #t79.{core::List::add}(#t80);
     else
-      for (final core::num #t77 in listDouble)
-        #t75.{core::List::add}(#t77);
-  } =>#t75;
+      for (final core::num #t81 in listDouble)
+        #t79.{core::List::add}(#t81);
+  } =>#t79;
   core::Set<core::num> set81 = block {
-    final core::Set<core::num> #t78 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t82 = col::LinkedHashSet::•<core::num>();
     if(self::oracle<core::String>("foo"))
-      for (final core::num #t79 in listInt)
-        #t78.{core::Set::add}(#t79);
+      for (final core::num #t83 in listInt)
+        #t82.{core::Set::add}(#t83);
     else
-      for (final core::num #t80 in listDouble)
-        #t78.{core::Set::add}(#t80);
-    #t78.{core::Set::add}(null);
-  } =>#t78;
+      for (final core::num #t84 in listDouble)
+        #t82.{core::Set::add}(#t84);
+    #t82.{core::Set::add}(null);
+  } =>#t82;
+  core::Set<dynamic> map81 = block {
+    final core::Set<dynamic> #t85 = col::LinkedHashSet::•<dynamic>();
+    if(self::oracle<core::String>("foo"))
+      #t85.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:68:38: Error: Unexpected type 'Map<String, double>' of a spread.  Expected 'dynamic' or an Iterable.
+ - 'Map' is from 'dart:core'.
+  var map81 = {if (oracle(\"foo\")) ...mapToInt else ...mapToDouble, null};
+                                     ^");
+    else
+      #t85.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:68:55: Error: Unexpected type 'Map<String, double>' of a spread.  Expected 'dynamic' or an Iterable.
+ - 'Map' is from 'dart:core'.
+  var map81 = {if (oracle(\"foo\")) ...mapToInt else ...mapToDouble, null};
+                                                      ^");
+    #t85.{core::Set::add}(null);
+  } =>#t85;
   core::List<dynamic> list82 = block {
-    final core::List<dynamic> #t81 = <dynamic>[];
+    final core::List<dynamic> #t86 = <dynamic>[];
     if(self::oracle<core::String>("foo"))
-      for (final dynamic #t82 in listInt as{TypeError} core::Iterable<dynamic>)
-        #t81.{core::List::add}(#t82);
+      for (final dynamic #t87 in listInt as{TypeError} core::Iterable<dynamic>)
+        #t86.{core::List::add}(#t87);
     else
-      for (final dynamic #t83 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t81.{core::List::add}(#t83);
-  } =>#t81;
+      for (final dynamic #t88 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t86.{core::List::add}(#t88);
+  } =>#t86;
   core::Set<dynamic> set82 = block {
-    final core::Set<dynamic> #t84 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t89 = col::LinkedHashSet::•<dynamic>();
     if(self::oracle<core::String>("foo"))
-      for (final dynamic #t85 in listInt as{TypeError} core::Iterable<dynamic>)
-        #t84.{core::Set::add}(#t85);
+      for (final dynamic #t90 in listInt as{TypeError} core::Iterable<dynamic>)
+        #t89.{core::Set::add}(#t90);
     else
-      for (final dynamic #t86 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t84.{core::Set::add}(#t86);
-    #t84.{core::Set::add}(null);
-  } =>#t84;
+      for (final dynamic #t91 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t89.{core::Set::add}(#t91);
+    #t89.{core::Set::add}(null);
+  } =>#t89;
+  core::Set<dynamic> map82 = block {
+    final core::Set<dynamic> #t92 = col::LinkedHashSet::•<dynamic>();
+    if(self::oracle<core::String>("foo"))
+      for (final dynamic #t93 in mapToInt as{TypeError} core::Iterable<dynamic>)
+        #t92.{core::Set::add}(#t93);
+    else
+      for (final dynamic #t94 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t92.{core::Set::add}(#t94);
+    #t92.{core::Set::add}(null);
+  } =>#t92;
   core::List<core::num> list83 = block {
-    final core::List<core::num> #t87 = <core::num>[];
+    final core::List<core::num> #t95 = <core::num>[];
     if(self::oracle<core::String>("foo"))
-      #t87.{core::List::add}(42);
+      #t95.{core::List::add}(42);
     else
-      for (final core::num #t88 in listDouble)
-        #t87.{core::List::add}(#t88);
-  } =>#t87;
+      for (final core::num #t96 in listDouble)
+        #t95.{core::List::add}(#t96);
+  } =>#t95;
   core::Set<core::num> set83 = block {
-    final core::Set<core::num> #t89 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t97 = col::LinkedHashSet::•<core::num>();
     if(self::oracle<core::String>("foo"))
-      for (final core::num #t90 in listInt)
-        #t89.{core::Set::add}(#t90);
+      for (final core::num #t98 in listInt)
+        #t97.{core::Set::add}(#t98);
     else
-      #t89.{core::Set::add}(3.14);
-    #t89.{core::Set::add}(null);
-  } =>#t89;
+      #t97.{core::Set::add}(3.14);
+    #t97.{core::Set::add}(null);
+  } =>#t97;
+  core::Set<dynamic> map83 = block {
+    final core::Set<dynamic> #t99 = col::LinkedHashSet::•<dynamic>();
+    if(self::oracle<core::String>("foo"))
+      #t99.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:74:38: Error: Unexpected type 'Map<String, int>' of a spread.  Expected 'dynamic' or an Iterable.
+ - 'Map' is from 'dart:core'.
+  var map83 = {if (oracle(\"foo\")) ...mapToInt else 3.14, null};
+                                     ^");
+    else
+      #t99.{core::Set::add}(3.14);
+    #t99.{core::Set::add}(null);
+  } =>#t99;
   core::List<core::int> list90 = block {
-    final core::List<core::int> #t91 = <core::int>[];
+    final core::List<core::int> #t100 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      #t91.{core::List::add}(dynVar as{TypeError} core::int);
-  } =>#t91;
+      #t100.{core::List::add}(dynVar as{TypeError} core::int);
+  } =>#t100;
   core::Set<core::int> set90 = block {
-    final core::Set<core::int> #t92 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t101 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      #t92.{core::Set::add}(dynVar as{TypeError} core::int);
-    #t92.{core::Set::add}(null);
-  } =>#t92;
+      #t101.{core::Set::add}(dynVar as{TypeError} core::int);
+    #t101.{core::Set::add}(null);
+  } =>#t101;
+  core::Map<core::String, core::int> map90 = block {
+    final core::Map<core::String, core::int> #t102 = <core::String, core::int>{};
+    if(self::oracle<core::String>("foo"))
+      #t102.{core::Map::[]=}("bar", dynVar);
+    #t102.{core::Map::[]=}("baz", null);
+  } =>#t102;
   core::List<core::int> list91 = block {
-    final core::List<core::int> #t93 = <core::int>[];
+    final core::List<core::int> #t103 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t94 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t93.{core::List::add}(#t94);
-  } =>#t93;
+      for (final core::int #t104 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t103.{core::List::add}(#t104);
+  } =>#t103;
   core::Set<core::int> set91 = block {
-    final core::Set<core::int> #t95 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t105 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t96 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t95.{core::Set::add}(#t96);
-    #t95.{core::Set::add}(null);
-  } =>#t95;
+      for (final core::int #t106 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t105.{core::Set::add}(#t106);
+    #t105.{core::Set::add}(null);
+  } =>#t105;
+  core::Map<core::String, core::int> map91 = <core::String, core::int>{"baz": null};
 }
 static method testIfElementErrors(core::Map<core::int, core::int> map) → dynamic {
-  <core::int>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:62:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+  <core::int>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:84:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>[if (oracle(\"foo\")) \"bar\"];
                            ^"];
-  let final core::Set<core::int> #t97 = col::LinkedHashSet::•<core::int>() in let final dynamic #t98 = #t97.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:63:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+  let final core::Set<core::int> #t107 = col::LinkedHashSet::•<core::int>() in let final dynamic #t108 = #t107.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:85:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>{if (oracle(\"foo\")) \"bar\", null};
-                           ^") in let final dynamic #t99 = #t97.{core::Set::add}(null) in #t97;
+                           ^") in let final dynamic #t109 = #t107.{core::Set::add}(null) in #t107;
+  <core::String, core::int>{null: invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:86:41: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+Try changing the type of the left hand side, or casting the right hand side to 'int'.
+  <String, int>{if (oracle(\"foo\")) \"bar\": \"bar\", \"baz\": null};
+                                        ^", "baz": null};
   block {
-    final core::List<core::int> #t100 = <core::int>[];
+    final core::List<core::int> #t110 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t101 in <core::int>[let final<BottomType> #t102 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:64:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+      for (final core::int #t111 in <core::int>[let final<BottomType> #t112 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:87:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>[if (oracle(\"foo\")) ...[\"bar\"]];
                                ^" in "bar" as{TypeError} core::int])
-        #t100.{core::List::add}(#t101);
-  } =>#t100;
+        #t110.{core::List::add}(#t111);
+  } =>#t110;
   block {
-    final core::Set<core::int> #t103 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t113 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t104 in <core::int>[let final<BottomType> #t105 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:65:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+      for (final core::int #t114 in <core::int>[let final<BottomType> #t115 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:88:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>{if (oracle(\"foo\")) ...[\"bar\"], null};
                                ^" in "bar" as{TypeError} core::int])
-        #t103.{core::Set::add}(#t104);
-    #t103.{core::Set::add}(null);
-  } =>#t103;
+        #t113.{core::Set::add}(#t114);
+    #t113.{core::Set::add}(null);
+  } =>#t113;
+  <core::String, core::int>{"baz": null};
   block {
-    final core::List<core::int> #t106 = <core::int>[];
+    final core::List<core::int> #t116 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      #t106.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:66:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t116.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:90:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[if (oracle(\"foo\")) ...map];
                               ^");
-  } =>#t106;
+  } =>#t116;
   block {
-    final core::Set<core::int> #t107 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t117 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      #t107.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:67:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t117.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:91:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{if (oracle(\"foo\")) ...map, null};
                               ^");
-    #t107.{core::Set::add}(null);
-  } =>#t107;
-  <core::String>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:68:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+    #t117.{core::Set::add}(null);
+  } =>#t117;
+  <core::String, core::int>{"baz": null};
+  <core::String>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:93:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 Try changing the type of the left hand side, or casting the right hand side to 'String'.
   <String>[if (oracle(\"foo\")) 42 else 3.14];
            ^"];
-  let final core::Set<core::String> #t108 = col::LinkedHashSet::•<core::String>() in let final dynamic #t109 = #t108.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:69:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+  let final core::Set<core::String> #t118 = col::LinkedHashSet::•<core::String>() in let final dynamic #t119 = #t118.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:94:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 Try changing the type of the left hand side, or casting the right hand side to 'String'.
   <String>{if (oracle(\"foo\")) 42 else 3.14, null};
-           ^") in let final dynamic #t110 = #t108.{core::Set::add}(null) in #t108;
+           ^") in let final dynamic #t120 = #t118.{core::Set::add}(null) in #t118;
+  <core::String, core::String>{null: invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:95:20: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+Try changing the type of the left hand side, or casting the right hand side to 'String'.
+  <String, String>{if (oracle(\"foo\")) \"bar\": 42 else \"baz\": 3.14, \"baz\": null};
+                   ^", "baz": null};
   block {
-    final core::List<core::int> #t111 = <core::int>[];
+    final core::List<core::int> #t121 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      #t111.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:70:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t121.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:96:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[if (oracle(\"foo\")) ...map else 42];
                               ^");
     else
-      #t111.{core::List::add}(42 as{TypeError} core::int);
-  } =>#t111;
+      #t121.{core::List::add}(42 as{TypeError} core::int);
+  } =>#t121;
   block {
-    final core::Set<core::int> #t112 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t122 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      #t112.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:71:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t122.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:97:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{if (oracle(\"foo\")) ...map else 42, null};
                               ^");
     else
-      #t112.{core::Set::add}(42 as{TypeError} core::int);
-    #t112.{core::Set::add}(null);
-  } =>#t112;
+      #t122.{core::Set::add}(42 as{TypeError} core::int);
+    #t122.{core::Set::add}(null);
+  } =>#t122;
+  <core::String, core::int>{"baz": null};
   block {
-    final core::List<core::int> #t113 = <core::int>[];
+    final core::List<core::int> #t123 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      #t113.{core::List::add}(42 as{TypeError} core::int);
+      #t123.{core::List::add}(42 as{TypeError} core::int);
     else
-      #t113.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:72:39: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t123.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:99:39: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[if (oracle(\"foo\")) 42 else ...map];
                                       ^");
-  } =>#t113;
+  } =>#t123;
   block {
-    final core::Set<core::int> #t114 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t124 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      #t114.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:73:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t124.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:100:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{if (oracle(\"foo\")) ...map else 42, null};
                               ^");
     else
-      #t114.{core::Set::add}(42 as{TypeError} core::int);
-    #t114.{core::Set::add}(null);
-  } =>#t114;
+      #t124.{core::Set::add}(42 as{TypeError} core::int);
+    #t124.{core::Set::add}(null);
+  } =>#t124;
+  <core::String, core::int>{"baz": null};
 }
 static method testForElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble, core::int index) → dynamic {
   core::List<core::int> list10 = block {
-    final core::List<core::int> #t115 = <core::int>[];
+    final core::List<core::int> #t125 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t115.{core::List::add}(42);
-  } =>#t115;
+      #t125.{core::List::add}(42);
+  } =>#t125;
   core::Set<core::int> set10 = block {
-    final core::Set<core::int> #t116 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t126 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t116.{core::Set::add}(42);
-    #t116.{core::Set::add}(null);
-  } =>#t116;
+      #t126.{core::Set::add}(42);
+    #t126.{core::Set::add}(null);
+  } =>#t126;
   core::List<dynamic> list11 = block {
-    final core::List<dynamic> #t117 = <dynamic>[];
+    final core::List<dynamic> #t127 = <dynamic>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t117.{core::List::add}(dynVar);
-  } =>#t117;
+      #t127.{core::List::add}(dynVar);
+  } =>#t127;
   core::Set<dynamic> set11 = block {
-    final core::Set<dynamic> #t118 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t128 = col::LinkedHashSet::•<dynamic>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t118.{core::Set::add}(dynVar);
-    #t118.{core::Set::add}(null);
-  } =>#t118;
+      #t128.{core::Set::add}(dynVar);
+    #t128.{core::Set::add}(null);
+  } =>#t128;
   core::List<core::List<core::int>> list12 = block {
-    final core::List<core::List<core::int>> #t119 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t129 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t119.{core::List::add}(<core::int>[42]);
-  } =>#t119;
+      #t129.{core::List::add}(<core::int>[42]);
+  } =>#t129;
   core::Set<core::List<core::int>> set12 = block {
-    final core::Set<core::List<core::int>> #t120 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t130 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t120.{core::Set::add}(<core::int>[42]);
-    #t120.{core::Set::add}(null);
-  } =>#t120;
+      #t130.{core::Set::add}(<core::int>[42]);
+    #t130.{core::Set::add}(null);
+  } =>#t130;
   core::List<core::int> list20 = block {
-    final core::List<core::int> #t121 = <core::int>[];
+    final core::List<core::int> #t131 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t122 in <core::int>[42])
-        #t121.{core::List::add}(#t122);
-  } =>#t121;
+      for (final core::int #t132 in <core::int>[42])
+        #t131.{core::List::add}(#t132);
+  } =>#t131;
   core::Set<core::int> set20 = block {
-    final core::Set<core::int> #t123 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t133 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t124 in <core::int>[42])
-        #t123.{core::Set::add}(#t124);
-    #t123.{core::Set::add}(null);
-  } =>#t123;
+      for (final core::int #t134 in <core::int>[42])
+        #t133.{core::Set::add}(#t134);
+    #t133.{core::Set::add}(null);
+  } =>#t133;
   core::List<dynamic> list21 = block {
-    final core::List<dynamic> #t125 = <dynamic>[];
+    final core::List<dynamic> #t135 = <dynamic>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final dynamic #t126 in <dynamic>[dynVar])
-        #t125.{core::List::add}(#t126);
-  } =>#t125;
+      for (final dynamic #t136 in <dynamic>[dynVar])
+        #t135.{core::List::add}(#t136);
+  } =>#t135;
   core::Set<dynamic> set21 = block {
-    final core::Set<dynamic> #t127 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t137 = col::LinkedHashSet::•<dynamic>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final dynamic #t128 in <dynamic>[dynVar])
-        #t127.{core::Set::add}(#t128);
-    #t127.{core::Set::add}(null);
-  } =>#t127;
+      for (final dynamic #t138 in <dynamic>[dynVar])
+        #t137.{core::Set::add}(#t138);
+    #t137.{core::Set::add}(null);
+  } =>#t137;
   core::List<core::List<core::int>> list22 = block {
-    final core::List<core::List<core::int>> #t129 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t139 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t130 in <core::List<core::int>>[<core::int>[42]])
-        #t129.{core::List::add}(#t130);
-  } =>#t129;
+      for (final core::List<core::int> #t140 in <core::List<core::int>>[<core::int>[42]])
+        #t139.{core::List::add}(#t140);
+  } =>#t139;
   core::Set<core::List<core::int>> set22 = block {
-    final core::Set<core::List<core::int>> #t131 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t141 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t132 in <core::List<core::int>>[<core::int>[42]])
-        #t131.{core::Set::add}(#t132);
-    #t131.{core::Set::add}(null);
-  } =>#t131;
+      for (final core::List<core::int> #t142 in <core::List<core::int>>[<core::int>[42]])
+        #t141.{core::Set::add}(#t142);
+    #t141.{core::Set::add}(null);
+  } =>#t141;
   core::List<core::int> list30 = block {
-    final core::List<core::int> #t133 = <core::int>[];
+    final core::List<core::int> #t143 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::int #t134 in <core::int>[42])
-          #t133.{core::List::add}(#t134);
-  } =>#t133;
+        for (final core::int #t144 in <core::int>[42])
+          #t143.{core::List::add}(#t144);
+  } =>#t143;
   core::Set<core::int> set30 = block {
-    final core::Set<core::int> #t135 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t145 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::int #t136 in <core::int>[42])
-          #t135.{core::Set::add}(#t136);
-    #t135.{core::Set::add}(null);
-  } =>#t135;
+        for (final core::int #t146 in <core::int>[42])
+          #t145.{core::Set::add}(#t146);
+    #t145.{core::Set::add}(null);
+  } =>#t145;
   core::List<dynamic> list31 = block {
-    final core::List<dynamic> #t137 = <dynamic>[];
+    final core::List<dynamic> #t147 = <dynamic>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final dynamic #t138 in <dynamic>[dynVar])
-          #t137.{core::List::add}(#t138);
-  } =>#t137;
+        for (final dynamic #t148 in <dynamic>[dynVar])
+          #t147.{core::List::add}(#t148);
+  } =>#t147;
   core::Set<dynamic> set31 = block {
-    final core::Set<dynamic> #t139 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t149 = col::LinkedHashSet::•<dynamic>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final dynamic #t140 in <dynamic>[dynVar])
-          #t139.{core::Set::add}(#t140);
-    #t139.{core::Set::add}(null);
-  } =>#t139;
+        for (final dynamic #t150 in <dynamic>[dynVar])
+          #t149.{core::Set::add}(#t150);
+    #t149.{core::Set::add}(null);
+  } =>#t149;
   core::List<core::List<core::int>> list33 = block {
-    final core::List<core::List<core::int>> #t141 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t151 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t142 in <core::List<core::int>>[<core::int>[42]])
-          #t141.{core::List::add}(#t142);
-  } =>#t141;
+        for (final core::List<core::int> #t152 in <core::List<core::int>>[<core::int>[42]])
+          #t151.{core::List::add}(#t152);
+  } =>#t151;
   core::Set<core::List<core::int>> set33 = block {
-    final core::Set<core::List<core::int>> #t143 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t153 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t144 in <core::List<core::int>>[<core::int>[42]])
-          #t143.{core::Set::add}(#t144);
-    #t143.{core::Set::add}(null);
-  } =>#t143;
+        for (final core::List<core::int> #t154 in <core::List<core::int>>[<core::int>[42]])
+          #t153.{core::Set::add}(#t154);
+    #t153.{core::Set::add}(null);
+  } =>#t153;
   core::List<core::List<core::int>> list40 = block {
-    final core::List<core::List<core::int>> #t145 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t155 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t146 in <core::List<core::int>>[<core::int>[]])
-        #t145.{core::List::add}(#t146);
-  } =>#t145;
+      for (final core::List<core::int> #t156 in <core::List<core::int>>[<core::int>[]])
+        #t155.{core::List::add}(#t156);
+  } =>#t155;
   core::Set<core::List<core::int>> set40 = block {
-    final core::Set<core::List<core::int>> #t147 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t157 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t148 in <core::List<core::int>>[<core::int>[]])
-        #t147.{core::Set::add}(#t148);
-    #t147.{core::Set::add}(null);
-  } =>#t147;
+      for (final core::List<core::int> #t158 in <core::List<core::int>>[<core::int>[]])
+        #t157.{core::Set::add}(#t158);
+    #t157.{core::Set::add}(null);
+  } =>#t157;
   core::List<core::List<core::int>> list41 = block {
-    final core::List<core::List<core::int>> #t149 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t159 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t150 in let final core::Set<core::List<core::int>> #t151 = col::LinkedHashSet::•<core::List<core::int>>() in let final dynamic #t152 = #t151.{core::Set::add}(<core::int>[]) in #t151)
-        #t149.{core::List::add}(#t150);
-  } =>#t149;
+      for (final core::List<core::int> #t160 in let final core::Set<core::List<core::int>> #t161 = col::LinkedHashSet::•<core::List<core::int>>() in let final dynamic #t162 = #t161.{core::Set::add}(<core::int>[]) in #t161)
+        #t159.{core::List::add}(#t160);
+  } =>#t159;
   core::Set<core::List<core::int>> set41 = block {
-    final core::Set<core::List<core::int>> #t153 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t163 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t154 in let final core::Set<core::List<core::int>> #t155 = col::LinkedHashSet::•<core::List<core::int>>() in let final dynamic #t156 = #t155.{core::Set::add}(<core::int>[]) in #t155)
-        #t153.{core::Set::add}(#t154);
-    #t153.{core::Set::add}(null);
-  } =>#t153;
+      for (final core::List<core::int> #t164 in let final core::Set<core::List<core::int>> #t165 = col::LinkedHashSet::•<core::List<core::int>>() in let final dynamic #t166 = #t165.{core::Set::add}(<core::int>[]) in #t165)
+        #t163.{core::Set::add}(#t164);
+    #t163.{core::Set::add}(null);
+  } =>#t163;
   core::List<core::List<core::int>> list42 = block {
-    final core::List<core::List<core::int>> #t157 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t167 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t158 in <core::List<core::int>>[<core::int>[]])
-          #t157.{core::List::add}(#t158);
-  } =>#t157;
+        for (final core::List<core::int> #t168 in <core::List<core::int>>[<core::int>[]])
+          #t167.{core::List::add}(#t168);
+  } =>#t167;
   core::Set<core::List<core::int>> set42 = block {
-    final core::Set<core::List<core::int>> #t159 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t169 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t160 in <core::List<core::int>>[<core::int>[]])
-          #t159.{core::Set::add}(#t160);
-    #t159.{core::Set::add}(null);
-  } =>#t159;
+        for (final core::List<core::int> #t170 in <core::List<core::int>>[<core::int>[]])
+          #t169.{core::Set::add}(#t170);
+    #t169.{core::Set::add}(null);
+  } =>#t169;
   core::List<core::int> list50 = block {
-    final core::List<core::int> #t161 = <core::int>[];
+    final core::List<core::int> #t171 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t162 in <core::int>[])
-        #t161.{core::List::add}(#t162);
-  } =>#t161;
+      for (final core::int #t172 in <core::int>[])
+        #t171.{core::List::add}(#t172);
+  } =>#t171;
   core::Set<core::int> set50 = block {
-    final core::Set<core::int> #t163 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t173 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t164 in <core::int>[])
-        #t163.{core::Set::add}(#t164);
-    #t163.{core::Set::add}(null);
-  } =>#t163;
+      for (final core::int #t174 in <core::int>[])
+        #t173.{core::Set::add}(#t174);
+    #t173.{core::Set::add}(null);
+  } =>#t173;
   core::List<core::int> list51 = block {
-    final core::List<core::int> #t165 = <core::int>[];
+    final core::List<core::int> #t175 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t166 in let final core::Set<core::int> #t167 = col::LinkedHashSet::•<core::int>() in #t167)
-        #t165.{core::List::add}(#t166);
-  } =>#t165;
+      for (final core::int #t176 in let final core::Set<core::int> #t177 = col::LinkedHashSet::•<core::int>() in #t177)
+        #t175.{core::List::add}(#t176);
+  } =>#t175;
   core::Set<core::int> set51 = block {
-    final core::Set<core::int> #t168 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t178 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t169 in let final core::Set<core::int> #t170 = col::LinkedHashSet::•<core::int>() in #t170)
-        #t168.{core::Set::add}(#t169);
-    #t168.{core::Set::add}(null);
-  } =>#t168;
+      for (final core::int #t179 in let final core::Set<core::int> #t180 = col::LinkedHashSet::•<core::int>() in #t180)
+        #t178.{core::Set::add}(#t179);
+    #t178.{core::Set::add}(null);
+  } =>#t178;
   core::List<core::int> list52 = block {
-    final core::List<core::int> #t171 = <core::int>[];
+    final core::List<core::int> #t181 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::int #t172 in <core::int>[])
-          #t171.{core::List::add}(#t172);
-  } =>#t171;
+        for (final core::int #t182 in <core::int>[])
+          #t181.{core::List::add}(#t182);
+  } =>#t181;
   core::Set<core::int> set52 = block {
-    final core::Set<core::int> #t173 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t183 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::int #t174 in <core::int>[])
-          #t173.{core::Set::add}(#t174);
-    #t173.{core::Set::add}(null);
-  } =>#t173;
+        for (final core::int #t184 in <core::int>[])
+          #t183.{core::Set::add}(#t184);
+    #t183.{core::Set::add}(null);
+  } =>#t183;
   core::List<core::List<core::int>> list60 = block {
-    final core::List<core::List<core::int>> #t175 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t185 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t176 in <core::List<core::int>>[<core::int>[]])
-        #t175.{core::List::add}(#t176);
-  } =>#t175;
+      for (final core::List<core::int> #t186 in <core::List<core::int>>[<core::int>[]])
+        #t185.{core::List::add}(#t186);
+  } =>#t185;
   core::Set<core::List<core::int>> set60 = block {
-    final core::Set<core::List<core::int>> #t177 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t187 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t178 in <core::List<core::int>>[<core::int>[]])
-        #t177.{core::Set::add}(#t178);
-    #t177.{core::Set::add}(null);
-  } =>#t177;
+      for (final core::List<core::int> #t188 in <core::List<core::int>>[<core::int>[]])
+        #t187.{core::Set::add}(#t188);
+    #t187.{core::Set::add}(null);
+  } =>#t187;
   core::List<core::List<core::int>> list61 = block {
-    final core::List<core::List<core::int>> #t179 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t189 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t180 in <core::List<core::int>>[<core::int>[]])
-          #t179.{core::List::add}(#t180);
-  } =>#t179;
+        for (final core::List<core::int> #t190 in <core::List<core::int>>[<core::int>[]])
+          #t189.{core::List::add}(#t190);
+  } =>#t189;
   core::Set<core::List<core::int>> set61 = block {
-    final core::Set<core::List<core::int>> #t181 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t191 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t182 in <core::List<core::int>>[<core::int>[]])
-          #t181.{core::Set::add}(#t182);
-    #t181.{core::Set::add}(null);
-  } =>#t181;
+        for (final core::List<core::int> #t192 in <core::List<core::int>>[<core::int>[]])
+          #t191.{core::Set::add}(#t192);
+    #t191.{core::Set::add}(null);
+  } =>#t191;
   core::List<core::List<core::int>> list70 = block {
-    final core::List<core::List<core::int>> #t183 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t193 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t183.{core::List::add}(<core::int>[]);
-  } =>#t183;
+      #t193.{core::List::add}(<core::int>[]);
+  } =>#t193;
   core::Set<core::List<core::int>> set70 = block {
-    final core::Set<core::List<core::int>> #t184 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t194 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t184.{core::Set::add}(<core::int>[]);
-    #t184.{core::Set::add}(null);
-  } =>#t184;
+      #t194.{core::Set::add}(<core::int>[]);
+    #t194.{core::Set::add}(null);
+  } =>#t194;
   core::List<core::List<core::int>> list71 = block {
-    final core::List<core::List<core::int>> #t185 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t195 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t185.{core::List::add}(<core::int>[]);
-  } =>#t185;
+        #t195.{core::List::add}(<core::int>[]);
+  } =>#t195;
   core::Set<core::List<core::int>> set71 = block {
-    final core::Set<core::List<core::int>> #t186 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t196 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t186.{core::Set::add}(<core::int>[]);
-    #t186.{core::Set::add}(null);
-  } =>#t186;
+        #t196.{core::Set::add}(<core::int>[]);
+    #t196.{core::Set::add}(null);
+  } =>#t196;
   core::List<core::num> list80 = block {
-    final core::List<core::num> #t187 = <core::num>[];
+    final core::List<core::num> #t197 = <core::num>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t187.{core::List::add}(42);
+        #t197.{core::List::add}(42);
       else
-        #t187.{core::List::add}(3.14);
-  } =>#t187;
+        #t197.{core::List::add}(3.14);
+  } =>#t197;
   core::Set<core::num> set80 = block {
-    final core::Set<core::num> #t188 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t198 = col::LinkedHashSet::•<core::num>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t188.{core::Set::add}(42);
+        #t198.{core::Set::add}(42);
       else
-        #t188.{core::Set::add}(3.14);
-    #t188.{core::Set::add}(null);
-  } =>#t188;
+        #t198.{core::Set::add}(3.14);
+    #t198.{core::Set::add}(null);
+  } =>#t198;
   core::List<core::num> list81 = block {
-    final core::List<core::num> #t189 = <core::num>[];
+    final core::List<core::num> #t199 = <core::num>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::num #t190 in listInt)
-          #t189.{core::List::add}(#t190);
+        for (final core::num #t200 in listInt)
+          #t199.{core::List::add}(#t200);
       else
-        for (final core::num #t191 in listDouble)
-          #t189.{core::List::add}(#t191);
-  } =>#t189;
+        for (final core::num #t201 in listDouble)
+          #t199.{core::List::add}(#t201);
+  } =>#t199;
   core::Set<core::num> set81 = block {
-    final core::Set<core::num> #t192 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t202 = col::LinkedHashSet::•<core::num>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::num #t193 in listInt)
-          #t192.{core::Set::add}(#t193);
+        for (final core::num #t203 in listInt)
+          #t202.{core::Set::add}(#t203);
       else
-        for (final core::num #t194 in listDouble)
-          #t192.{core::Set::add}(#t194);
-    #t192.{core::Set::add}(null);
-  } =>#t192;
+        for (final core::num #t204 in listDouble)
+          #t202.{core::Set::add}(#t204);
+    #t202.{core::Set::add}(null);
+  } =>#t202;
   core::List<dynamic> list82 = block {
-    final core::List<dynamic> #t195 = <dynamic>[];
+    final core::List<dynamic> #t205 = <dynamic>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final dynamic #t196 in listInt as{TypeError} core::Iterable<dynamic>)
-          #t195.{core::List::add}(#t196);
+        for (final dynamic #t206 in listInt as{TypeError} core::Iterable<dynamic>)
+          #t205.{core::List::add}(#t206);
       else
-        for (final dynamic #t197 in dynVar as{TypeError} core::Iterable<dynamic>)
-          #t195.{core::List::add}(#t197);
-  } =>#t195;
+        for (final dynamic #t207 in dynVar as{TypeError} core::Iterable<dynamic>)
+          #t205.{core::List::add}(#t207);
+  } =>#t205;
   core::Set<dynamic> set82 = block {
-    final core::Set<dynamic> #t198 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t208 = col::LinkedHashSet::•<dynamic>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final dynamic #t199 in listInt as{TypeError} core::Iterable<dynamic>)
-          #t198.{core::Set::add}(#t199);
+        for (final dynamic #t209 in listInt as{TypeError} core::Iterable<dynamic>)
+          #t208.{core::Set::add}(#t209);
       else
-        for (final dynamic #t200 in dynVar as{TypeError} core::Iterable<dynamic>)
-          #t198.{core::Set::add}(#t200);
-    #t198.{core::Set::add}(null);
-  } =>#t198;
+        for (final dynamic #t210 in dynVar as{TypeError} core::Iterable<dynamic>)
+          #t208.{core::Set::add}(#t210);
+    #t208.{core::Set::add}(null);
+  } =>#t208;
   core::List<core::num> list83 = block {
-    final core::List<core::num> #t201 = <core::num>[];
+    final core::List<core::num> #t211 = <core::num>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t201.{core::List::add}(42);
+        #t211.{core::List::add}(42);
       else
-        for (final core::num #t202 in listDouble)
-          #t201.{core::List::add}(#t202);
-  } =>#t201;
+        for (final core::num #t212 in listDouble)
+          #t211.{core::List::add}(#t212);
+  } =>#t211;
   core::Set<core::num> set83 = block {
-    final core::Set<core::num> #t203 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t213 = col::LinkedHashSet::•<core::num>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::num #t204 in listInt)
-          #t203.{core::Set::add}(#t204);
+        for (final core::num #t214 in listInt)
+          #t213.{core::Set::add}(#t214);
       else
-        #t203.{core::Set::add}(3.14);
-    #t203.{core::Set::add}(null);
-  } =>#t203;
+        #t213.{core::Set::add}(3.14);
+    #t213.{core::Set::add}(null);
+  } =>#t213;
   core::List<core::int> list90 = block {
-    final core::List<core::int> #t205 = <core::int>[];
+    final core::List<core::int> #t215 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t205.{core::List::add}(dynVar as{TypeError} core::int);
-  } =>#t205;
+      #t215.{core::List::add}(dynVar as{TypeError} core::int);
+  } =>#t215;
   core::Set<core::int> set90 = block {
-    final core::Set<core::int> #t206 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t216 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t206.{core::Set::add}(dynVar as{TypeError} core::int);
-    #t206.{core::Set::add}(null);
-  } =>#t206;
+      #t216.{core::Set::add}(dynVar as{TypeError} core::int);
+    #t216.{core::Set::add}(null);
+  } =>#t216;
   core::List<core::int> list91 = block {
-    final core::List<core::int> #t207 = <core::int>[];
+    final core::List<core::int> #t217 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t208 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t207.{core::List::add}(#t208);
-  } =>#t207;
+      for (final core::int #t218 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t217.{core::List::add}(#t218);
+  } =>#t217;
   core::Set<core::int> set91 = block {
-    final core::Set<core::int> #t209 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t219 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t210 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t209.{core::Set::add}(#t210);
-    #t209.{core::Set::add}(null);
-  } =>#t209;
+      for (final core::int #t220 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t219.{core::Set::add}(#t220);
+    #t219.{core::Set::add}(null);
+  } =>#t219;
   core::List<core::int> list100 = block {
-    final core::List<core::int> #t211 = <core::int>[];
-    for (final dynamic #t212 = index = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; index = index.{core::num::+}(1))
-      #t211.{core::List::add}(42);
-  } =>#t211;
+    final core::List<core::int> #t221 = <core::int>[];
+    for (final dynamic #t222 = index = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; index = index.{core::num::+}(1))
+      #t221.{core::List::add}(42);
+  } =>#t221;
   core::Set<core::int> set100 = block {
-    final core::Set<core::int> #t213 = col::LinkedHashSet::•<core::int>();
-    for (final dynamic #t214 = index = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; index = index.{core::num::+}(1))
-      #t213.{core::Set::add}(42);
-  } =>#t213;
+    final core::Set<core::int> #t223 = col::LinkedHashSet::•<core::int>();
+    for (final dynamic #t224 = index = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; index = index.{core::num::+}(1))
+      #t223.{core::Set::add}(42);
+  } =>#t223;
   core::List<core::int> list110 = block {
-    final core::List<core::int> #t215 = <core::int>[];
+    final core::List<core::int> #t225 = <core::int>[];
     for (core::int i in <core::int>[1, 2, 3])
-      #t215.{core::List::add}(i);
-  } =>#t215;
+      #t225.{core::List::add}(i);
+  } =>#t225;
   core::Set<core::int> set110 = block {
-    final core::Set<core::int> #t216 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t226 = col::LinkedHashSet::•<core::int>();
     for (core::int i in <core::int>[1, 2, 3])
-      #t216.{core::Set::add}(i);
-    #t216.{core::Set::add}(null);
-  } =>#t216;
+      #t226.{core::Set::add}(i);
+    #t226.{core::Set::add}(null);
+  } =>#t226;
   core::List<core::int> list120 = block {
-    final core::List<core::int> #t217 = <core::int>[];
+    final core::List<core::int> #t227 = <core::int>[];
     for (dynamic i in dynVar as{TypeError} core::Iterable<dynamic>)
-      #t217.{core::List::add}(i as{TypeError} core::int);
-  } =>#t217;
+      #t227.{core::List::add}(i as{TypeError} core::int);
+  } =>#t227;
   core::Set<core::int> set120 = block {
-    final core::Set<core::int> #t218 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t228 = col::LinkedHashSet::•<core::int>();
     for (dynamic i in dynVar as{TypeError} core::Iterable<dynamic>)
-      #t218.{core::Set::add}(i as{TypeError} core::int);
-    #t218.{core::Set::add}(null);
-  } =>#t218;
+      #t228.{core::Set::add}(i as{TypeError} core::int);
+    #t228.{core::Set::add}(null);
+  } =>#t228;
 }
 static method testForElementErrors(core::Map<core::int, core::int> map) → dynamic async {
-  <core::int>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:137:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+  <core::int>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:165:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) \"bar\"];
                                             ^"];
-  let final core::Set<core::int> #t219 = col::LinkedHashSet::•<core::int>() in let final dynamic #t220 = #t219.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:138:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+  let final core::Set<core::int> #t229 = col::LinkedHashSet::•<core::int>() in let final dynamic #t230 = #t229.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:166:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) \"bar\", null};
-                                            ^") in let final dynamic #t221 = #t219.{core::Set::add}(null) in #t219;
+                                            ^") in let final dynamic #t231 = #t229.{core::Set::add}(null) in #t229;
   block {
-    final core::List<core::int> #t222 = <core::int>[];
+    final core::List<core::int> #t232 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t223 in <core::int>[let final<BottomType> #t224 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:139:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+      for (final core::int #t233 in <core::int>[let final<BottomType> #t234 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:167:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) ...[\"bar\"]];
                                                 ^" in "bar" as{TypeError} core::int])
-        #t222.{core::List::add}(#t223);
-  } =>#t222;
+        #t232.{core::List::add}(#t233);
+  } =>#t232;
   block {
-    final core::Set<core::int> #t225 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t235 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t226 in <core::int>[let final<BottomType> #t227 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:140:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+      for (final core::int #t236 in <core::int>[let final<BottomType> #t237 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:168:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) ...[\"bar\"], null};
                                                 ^" in "bar" as{TypeError} core::int])
-        #t225.{core::Set::add}(#t226);
-    #t225.{core::Set::add}(null);
-  } =>#t225;
+        #t235.{core::Set::add}(#t236);
+    #t235.{core::Set::add}(null);
+  } =>#t235;
   block {
-    final core::List<core::int> #t228 = <core::int>[];
+    final core::List<core::int> #t238 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t228.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:141:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t238.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:169:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) ...map];
                                                ^");
-  } =>#t228;
+  } =>#t238;
   block {
-    final core::Set<core::int> #t229 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t239 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t229.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:142:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t239.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:170:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) ...map, null};
                                                ^");
-    #t229.{core::Set::add}(null);
-  } =>#t229;
-  <core::String>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:143:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+    #t239.{core::Set::add}(null);
+  } =>#t239;
+  <core::String>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:171:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 Try changing the type of the left hand side, or casting the right hand side to 'String'.
   <String>[for (int i = 0; oracle(\"foo\"); i++) if (oracle()) 42 else 3.14];
                                                ^"];
-  let final core::Set<core::String> #t230 = col::LinkedHashSet::•<core::String>() in let final dynamic #t231 = #t230.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:144:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+  let final core::Set<core::String> #t240 = col::LinkedHashSet::•<core::String>() in let final dynamic #t241 = #t240.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:172:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 Try changing the type of the left hand side, or casting the right hand side to 'String'.
   <String>{for (int i = 0; oracle(\"foo\"); i++) if (oracle()) 42 else 3.14, null};
-                                               ^") in let final dynamic #t232 = #t230.{core::Set::add}(null) in #t230;
+                                               ^") in let final dynamic #t242 = #t240.{core::Set::add}(null) in #t240;
   block {
-    final core::List<core::int> #t233 = <core::int>[];
+    final core::List<core::int> #t243 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t233.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:145:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+        #t243.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:173:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) if (oracle()) ...map else 42];
                                                              ^");
       else
-        #t233.{core::List::add}(42 as{TypeError} core::int);
-  } =>#t233;
+        #t243.{core::List::add}(42 as{TypeError} core::int);
+  } =>#t243;
   block {
-    final core::Set<core::int> #t234 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t244 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t234.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:146:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+        #t244.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:174:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) if (oracle()) ...map else 42, null};
                                                              ^");
       else
-        #t234.{core::Set::add}(42 as{TypeError} core::int);
-    #t234.{core::Set::add}(null);
-  } =>#t234;
+        #t244.{core::Set::add}(42 as{TypeError} core::int);
+    #t244.{core::Set::add}(null);
+  } =>#t244;
   block {
-    final core::List<core::int> #t235 = <core::int>[];
+    final core::List<core::int> #t245 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t235.{core::List::add}(42 as{TypeError} core::int);
+        #t245.{core::List::add}(42 as{TypeError} core::int);
       else
-        #t235.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:147:70: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+        #t245.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:175:70: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) if (oracle()) 42 else ...map];
                                                                      ^");
-  } =>#t235;
+  } =>#t245;
   block {
-    final core::Set<core::int> #t236 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t246 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t236.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:148:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+        #t246.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:176:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) if (oracle()) ...map else 42, null};
                                                              ^");
       else
-        #t236.{core::Set::add}(42 as{TypeError} core::int);
-    #t236.{core::Set::add}(null);
-  } =>#t236;
+        #t246.{core::Set::add}(42 as{TypeError} core::int);
+    #t246.{core::Set::add}(null);
+  } =>#t246;
   final core::int i = 0;
   block {
-    final core::List<core::int> #t237 = <core::int>[];
-    for (final core::int #t238 in <core::int>[1]) {
-      invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:151:14: Error: Setter not found: 'i'.
+    final core::List<core::int> #t247 = <core::int>[];
+    for (final core::int #t248 in <core::int>[1]) {
+      invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:179:14: Error: Setter not found: 'i'.
   <int>[for (i in <int>[1]) i];
              ^";
-      #t237.{core::List::add}(i);
+      #t247.{core::List::add}(i);
     }
-  } =>#t237;
+  } =>#t247;
   block {
-    final core::Set<core::int> #t239 = col::LinkedHashSet::•<core::int>();
-    for (final core::int #t240 in <core::int>[1]) {
-      invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:152:14: Error: Setter not found: 'i'.
+    final core::Set<core::int> #t249 = col::LinkedHashSet::•<core::int>();
+    for (final core::int #t250 in <core::int>[1]) {
+      invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:180:14: Error: Setter not found: 'i'.
   <int>{for (i in <int>[1]) i, null};
              ^";
-      #t239.{core::Set::add}(i);
+      #t249.{core::Set::add}(i);
     }
-    #t239.{core::Set::add}(null);
-  } =>#t239;
+    #t249.{core::Set::add}(null);
+  } =>#t249;
   core::List<dynamic> list10 = block {
-    final core::List<dynamic> #t241 = <dynamic>[];
-    for (dynamic i in let final<BottomType> #t242 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:154:31: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+    final core::List<dynamic> #t251 = <dynamic>[];
+    for (dynamic i in let final<BottomType> #t252 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:182:31: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
  - 'Iterable' is from 'dart:core'.
   var list10 = [for (var i in \"not iterable\") i];
                               ^" in "not iterable" as{TypeError} core::Iterable<dynamic>)
-      #t241.{core::List::add}(i);
-  } =>#t241;
+      #t251.{core::List::add}(i);
+  } =>#t251;
   core::Set<dynamic> set10 = block {
-    final core::Set<dynamic> #t243 = col::LinkedHashSet::•<dynamic>();
-    for (dynamic i in let final<BottomType> #t244 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:155:30: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+    final core::Set<dynamic> #t253 = col::LinkedHashSet::•<dynamic>();
+    for (dynamic i in let final<BottomType> #t254 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:183:30: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
  - 'Iterable' is from 'dart:core'.
   var set10 = {for (var i in \"not iterable\") i, null};
                              ^" in "not iterable" as{TypeError} core::Iterable<dynamic>)
-      #t243.{core::Set::add}(i);
-    #t243.{core::Set::add}(null);
-  } =>#t243;
+      #t253.{core::Set::add}(i);
+    #t253.{core::Set::add}(null);
+  } =>#t253;
   core::List<core::int> list20 = block {
-    final core::List<core::int> #t245 = <core::int>[];
-    for (core::int i in <core::int>[let final<BottomType> #t246 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:156:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+    final core::List<core::int> #t255 = <core::int>[];
+    for (core::int i in <core::int>[let final<BottomType> #t256 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:184:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var list20 = [for (int i in [\"not\", \"int\"]) i];
-                               ^" in "not" as{TypeError} core::int, let final<BottomType> #t247 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:156:39: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+                               ^" in "not" as{TypeError} core::int, let final<BottomType> #t257 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:184:39: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var list20 = [for (int i in [\"not\", \"int\"]) i];
                                       ^" in "int" as{TypeError} core::int])
-      #t245.{core::List::add}(i);
-  } =>#t245;
+      #t255.{core::List::add}(i);
+  } =>#t255;
   core::Set<core::int> set20 = block {
-    final core::Set<core::int> #t248 = col::LinkedHashSet::•<core::int>();
-    for (core::int i in <core::int>[let final<BottomType> #t249 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:157:31: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+    final core::Set<core::int> #t258 = col::LinkedHashSet::•<core::int>();
+    for (core::int i in <core::int>[let final<BottomType> #t259 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:185:31: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var set20 = {for (int i in [\"not\", \"int\"]) i, null};
-                              ^" in "not" as{TypeError} core::int, let final<BottomType> #t250 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:157:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+                              ^" in "not" as{TypeError} core::int, let final<BottomType> #t260 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:185:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var set20 = {for (int i in [\"not\", \"int\"]) i, null};
                                      ^" in "int" as{TypeError} core::int])
-      #t248.{core::Set::add}(i);
-    #t248.{core::Set::add}(null);
-  } =>#t248;
+      #t258.{core::Set::add}(i);
+    #t258.{core::Set::add}(null);
+  } =>#t258;
   core::List<dynamic> list30 = block {
-    final core::List<dynamic> #t251 = <dynamic>[];
-    await for (dynamic i in let final<BottomType> #t252 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:158:37: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+    final core::List<dynamic> #t261 = <dynamic>[];
+    await for (dynamic i in let final<BottomType> #t262 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:186:37: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
  - 'Stream' is from 'dart:async'.
   var list30 = [await for (var i in \"not stream\") i];
                                     ^" in "not stream" as{TypeError} asy::Stream<dynamic>)
-      #t251.{core::List::add}(i);
-  } =>#t251;
+      #t261.{core::List::add}(i);
+  } =>#t261;
   core::Set<dynamic> set30 = block {
-    final core::Set<dynamic> #t253 = col::LinkedHashSet::•<dynamic>();
-    await for (dynamic i in let final<BottomType> #t254 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:159:36: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+    final core::Set<dynamic> #t263 = col::LinkedHashSet::•<dynamic>();
+    await for (dynamic i in let final<BottomType> #t264 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:187:36: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
  - 'Stream' is from 'dart:async'.
   var set30 = {await for (var i in \"not stream\") i, null};
                                    ^" in "not stream" as{TypeError} asy::Stream<dynamic>)
-      #t253.{core::Set::add}(i);
-    #t253.{core::Set::add}(null);
-  } =>#t253;
+      #t263.{core::Set::add}(i);
+    #t263.{core::Set::add}(null);
+  } =>#t263;
   core::List<core::int> list40 = block {
-    final core::List<core::int> #t255 = <core::int>[];
-    await for (core::int i in asy::Stream::fromIterable<core::int>(<core::int>[let final<BottomType> #t256 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:160:58: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+    final core::List<core::int> #t265 = <core::int>[];
+    await for (core::int i in asy::Stream::fromIterable<core::int>(<core::int>[let final<BottomType> #t266 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:188:58: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var list40 = [await for (int i in Stream.fromIterable([\"not\", \"int\"])) i];
-                                                         ^" in "not" as{TypeError} core::int, let final<BottomType> #t257 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:160:65: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+                                                         ^" in "not" as{TypeError} core::int, let final<BottomType> #t267 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:188:65: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var list40 = [await for (int i in Stream.fromIterable([\"not\", \"int\"])) i];
                                                                 ^" in "int" as{TypeError} core::int]))
-      #t255.{core::List::add}(i);
-  } =>#t255;
+      #t265.{core::List::add}(i);
+  } =>#t265;
   core::Set<core::int> set40 = block {
-    final core::Set<core::int> #t258 = col::LinkedHashSet::•<core::int>();
-    await for (core::int i in asy::Stream::fromIterable<core::int>(<core::int>[let final<BottomType> #t259 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:161:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+    final core::Set<core::int> #t268 = col::LinkedHashSet::•<core::int>();
+    await for (core::int i in asy::Stream::fromIterable<core::int>(<core::int>[let final<BottomType> #t269 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:189:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var set40 = {await for (int i in Stream.fromIterable([\"not\", \"int\"])) i, null};
-                                                        ^" in "not" as{TypeError} core::int, let final<BottomType> #t260 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:161:64: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+                                                        ^" in "not" as{TypeError} core::int, let final<BottomType> #t270 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:189:64: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var set40 = {await for (int i in Stream.fromIterable([\"not\", \"int\"])) i, null};
                                                                ^" in "int" as{TypeError} core::int]))
-      #t258.{core::Set::add}(i);
-    #t258.{core::Set::add}(null);
-  } =>#t258;
+      #t268.{core::Set::add}(i);
+    #t268.{core::Set::add}(null);
+  } =>#t268;
   core::List<core::int> list50 = block {
-    final core::List<core::int> #t261 = <core::int>[];
+    final core::List<core::int> #t271 = <core::int>[];
     for (; ; )
-      #t261.{core::List::add}(42);
-  } =>#t261;
+      #t271.{core::List::add}(42);
+  } =>#t271;
   core::Set<core::int> set50 = block {
-    final core::Set<core::int> #t262 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t272 = col::LinkedHashSet::•<core::int>();
     for (; ; )
-      #t262.{core::Set::add}(42);
-    #t262.{core::Set::add}(null);
-  } =>#t262;
+      #t272.{core::Set::add}(42);
+    #t272.{core::Set::add}(null);
+  } =>#t272;
   core::List<core::int> list60 = block {
-    final core::List<core::int> #t263 = <core::int>[];
-    for (; let final<BottomType> #t264 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:164:24: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
+    final core::List<core::int> #t273 = <core::int>[];
+    for (; let final<BottomType> #t274 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:192:24: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
 Try changing the type of the left hand side, or casting the right hand side to 'bool'.
   var list60 = [for (; \"not bool\";) 42];
                        ^" in "not bool" as{TypeError} core::bool; )
-      #t263.{core::List::add}(42);
-  } =>#t263;
+      #t273.{core::List::add}(42);
+  } =>#t273;
   core::Set<core::int> set60 = block {
-    final core::Set<core::int> #t265 = col::LinkedHashSet::•<core::int>();
-    for (; let final<BottomType> #t266 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:165:23: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
+    final core::Set<core::int> #t275 = col::LinkedHashSet::•<core::int>();
+    for (; let final<BottomType> #t276 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:193:23: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
 Try changing the type of the left hand side, or casting the right hand side to 'bool'.
   var set60 = {for (; \"not bool\";) 42, null};
                       ^" in "not bool" as{TypeError} core::bool; )
-      #t265.{core::Set::add}(42);
-    #t265.{core::Set::add}(null);
-  } =>#t265;
+      #t275.{core::Set::add}(42);
+    #t275.{core::Set::add}(null);
+  } =>#t275;
 }
 static method testForElementErrorsNotAsync(asy::Stream<core::int> stream) → dynamic {
   block {
-    final core::List<core::int> #t267 = <core::int>[];
+    final core::List<core::int> #t277 = <core::int>[];
     await for (core::int i in stream)
-      #t267.{core::List::add}(i);
-  } =>#t267;
+      #t277.{core::List::add}(i);
+  } =>#t277;
   block {
-    final core::Set<core::int> #t268 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t278 = col::LinkedHashSet::•<core::int>();
     await for (core::int i in stream)
-      #t268.{core::Set::add}(i);
-  } =>#t268;
+      #t278.{core::Set::add}(i);
+  } =>#t278;
 }
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/control_flow_collection_inference.dart.strong.transformed.expect b/pkg/front_end/testcases/control_flow_collection_inference.dart.strong.transformed.expect
index 4f6f84fcf909..f657cd77e8bd 100644
--- a/pkg/front_end/testcases/control_flow_collection_inference.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/control_flow_collection_inference.dart.strong.transformed.expect
@@ -2,220 +2,317 @@ library;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:62:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:21:16: Error: Expected ':' after this.
+//   var map20 = {if (oracle("foo")) ...{"bar": 42}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:24:16: Error: Expected ':' after this.
+//   var map21 = {if (oracle("foo")) ...{"bar": dynVar}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:27:16: Error: Expected ':' after this.
+//   var map22 = {if (oracle("foo")) ...{"bar": [42]}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:30:16: Error: Expected ':' after this.
+//   var map30 = {if (oracle("foo")) if (oracle()) ...{"bar": 42}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:33:16: Error: Expected ':' after this.
+//   var map31 = {if (oracle("foo")) if (oracle()) ...{"bar": dynVar}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:36:16: Error: Expected ':' after this.
+//   var map33 = {if (oracle("foo")) if (oracle()) ...{"bar": [42]}, "baz": null};
+//                ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:39:35: Error: Expected ':' after this.
+//   Map<String, List<int>> map40 = {if (oracle("foo")) ...{"bar", []}, "baz": null};
+//                                   ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:44:35: Error: Expected ':' after this.
+//   Map<String, List<int>> map42 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                   ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:3: Error: Expected 2 type arguments.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//   ^^^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:47:21: Error: Expected ':' after this.
+//   Map<int> map50 = {if (oracle("foo")) ...{}, "baz": null};
+//                     ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:52:29: Error: Expected ':' after this.
+//   Map<String, int> map52 = {if (oracle("foo")) if (oracle()) ...{}, "baz": null};
+//                             ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:55:35: Error: Expected ':' after this.
+//   Map<String, List<int>> map60 = {if (oracle("foo")) ...{"bar": []}, "baz": null};
+//                                   ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:58:35: Error: Expected ':' after this.
+//   Map<String, List<int>> map61 = {if (oracle("foo")) if (oracle()) ...{"bar": []}, "baz": null};
+//                                   ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:80:29: Error: Expected ':' after this.
+//   Map<String, int> map91 = {if (oracle("foo")) ...dynVar, "baz": null};
+//                             ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:38: Error: Unexpected type 'Map<String, double>' of a spread.  Expected 'dynamic' or an Iterable.
+//  - 'Map' is from 'dart:core'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                                      ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:68:55: Error: Unexpected type 'Map<String, double>' of a spread.  Expected 'dynamic' or an Iterable.
+//  - 'Map' is from 'dart:core'.
+//   var map81 = {if (oracle("foo")) ...mapToInt else ...mapToDouble, null};
+//                                                       ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:74:38: Error: Unexpected type 'Map<String, int>' of a spread.  Expected 'dynamic' or an Iterable.
+//  - 'Map' is from 'dart:core'.
+//   var map83 = {if (oracle("foo")) ...mapToInt else 3.14, null};
+//                                      ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:89:17: Error: Expected ':' after this.
+//   <String, int>{if (oracle("foo")) ...{"bar": "bar"}, "baz": null};
+//                 ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:92:17: Error: Expected ':' after this.
+//   <String, int>{if (oracle("foo")) ...["bar"], "baz": null};
+//                 ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:98:17: Error: Expected ':' after this.
+//   <String, int>{if (oracle("foo")) ...[42] else {"bar": 42}, "baz": null};
+//                 ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:101:17: Error: Expected ':' after this.
+//   <String, int>{if (oracle("foo")) {"bar": 42} else ...[42], "baz": null};
+//                 ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:84:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>[if (oracle("foo")) "bar"];
 //                            ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:63:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:85:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>{if (oracle("foo")) "bar", null};
 //                            ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:64:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:86:41: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   <String, int>{if (oracle("foo")) "bar": "bar", "baz": null};
+//                                         ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:87:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>[if (oracle("foo")) ...["bar"]];
 //                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:65:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:88:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>{if (oracle("foo")) ...["bar"], null};
 //                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:66:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:90:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[if (oracle("foo")) ...map];
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:67:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:91:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{if (oracle("foo")) ...map, null};
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:68:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:93:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   <String>[if (oracle("foo")) 42 else 3.14];
 //            ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:69:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:94:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   <String>{if (oracle("foo")) 42 else 3.14, null};
 //            ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:70:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:95:20: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   <String, String>{if (oracle("foo")) "bar": 42 else "baz": 3.14, "baz": null};
+//                    ^
+//
+// pkg/front_end/testcases/control_flow_collection_inference.dart:96:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[if (oracle("foo")) ...map else 42];
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:71:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:97:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:72:39: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:99:39: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[if (oracle("foo")) 42 else ...map];
 //                                       ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:73:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:100:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{if (oracle("foo")) ...map else 42, null};
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:151:14: Error: Setter not found: 'i'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:179:14: Error: Setter not found: 'i'.
 //   <int>[for (i in <int>[1]) i];
 //              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:152:14: Error: Setter not found: 'i'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:180:14: Error: Setter not found: 'i'.
 //   <int>{for (i in <int>[1]) i, null};
 //              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:162:17: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:190:17: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
 // Try removing the keyword, or use a for-each statement.
 //   var list50 = [await for (;;) 42];
 //                 ^^^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:163:16: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:191:16: Error: The keyword 'await' isn't allowed for a normal 'for' statement.
 // Try removing the keyword, or use a for-each statement.
 //   var set50 = {await for (;;) 42, null};
 //                ^^^^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:137:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:165:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>[for (int i = 0; oracle("foo"); i++) "bar"];
 //                                             ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:138:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:166:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>{for (int i = 0; oracle("foo"); i++) "bar", null};
 //                                             ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:139:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:167:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...["bar"]];
 //                                                 ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:140:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:168:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...["bar"], null};
 //                                                 ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:141:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:169:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[for (int i = 0; oracle("foo"); i++) ...map];
 //                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:142:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:170:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{for (int i = 0; oracle("foo"); i++) ...map, null};
 //                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:143:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:171:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   <String>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
 //                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:144:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:172:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   <String>{for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
 //                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:145:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:173:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42];
 //                                                              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:146:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:174:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                                              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:147:70: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:175:70: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...map];
 //                                                                      ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:148:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:176:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
 //  - 'Map' is from 'dart:core'.
 //   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
 //                                                              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:154:31: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:182:31: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
 //  - 'Iterable' is from 'dart:core'.
 //   var list10 = [for (var i in "not iterable") i];
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:155:30: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:183:30: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
 //  - 'Iterable' is from 'dart:core'.
 //   var set10 = {for (var i in "not iterable") i, null};
 //                              ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:156:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:184:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var list20 = [for (int i in ["not", "int"]) i];
 //                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:156:39: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:184:39: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var list20 = [for (int i in ["not", "int"]) i];
 //                                       ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:157:31: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:185:31: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var set20 = {for (int i in ["not", "int"]) i, null};
 //                               ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:157:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:185:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var set20 = {for (int i in ["not", "int"]) i, null};
 //                                      ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:158:37: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:186:37: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
 //  - 'Stream' is from 'dart:async'.
 //   var list30 = [await for (var i in "not stream") i];
 //                                     ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:159:36: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:187:36: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
 //  - 'Stream' is from 'dart:async'.
 //   var set30 = {await for (var i in "not stream") i, null};
 //                                    ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:160:58: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:188:58: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var list40 = [await for (int i in Stream.fromIterable(["not", "int"])) i];
 //                                                          ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:160:65: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:188:65: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var list40 = [await for (int i in Stream.fromIterable(["not", "int"])) i];
 //                                                                 ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:161:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:189:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var set40 = {await for (int i in Stream.fromIterable(["not", "int"])) i, null};
 //                                                         ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:161:64: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:189:64: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var set40 = {await for (int i in Stream.fromIterable(["not", "int"])) i, null};
 //                                                                ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:164:24: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:192:24: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
 // Try changing the type of the left hand side, or casting the right hand side to 'bool'.
 //   var list60 = [for (; "not bool";) 42];
 //                        ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:165:23: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:193:23: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
 // Try changing the type of the left hand side, or casting the right hand side to 'bool'.
 //   var set60 = {for (; "not bool";) 42, null};
 //                       ^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:169:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:197:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
 // Try marking the function body with either 'async' or 'async*', or removing the 'await' before the for loop.
 //   <int>[await for (int i in stream) i];
 //                          ^^
 //
-// pkg/front_end/testcases/control_flow_collection_inference.dart:170:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
+// pkg/front_end/testcases/control_flow_collection_inference.dart:198:26: Error: The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
 // Try marking the function body with either 'async' or 'async*', or removing the 'await' before the for loop.
 //   <int>{await for (int i in stream) i};
 //                          ^^
@@ -227,7 +324,7 @@ import "dart:async" as asy;
 
 static method oracle<T extends core::Object = dynamic>([self::oracle::T t = null]) → dynamic
   return true;
-static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble) → dynamic {
+static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble, core::Map<core::String, core::int> mapToInt, core::Map<core::String, core::double> mapToDouble) → dynamic {
   core::List<core::int> list10 = block {
     final core::List<core::int> #t1 = <core::int>[];
     if(self::oracle<core::String>("foo"))
@@ -239,823 +336,915 @@ static method testIfElement(dynamic dynVar, core::List<core::int> listInt, core:
       #t2.{core::Set::add}(42);
     #t2.{core::Set::add}(null);
   } =>#t2;
-  core::List<dynamic> list11 = block {
-    final core::List<dynamic> #t3 = <dynamic>[];
+  core::Map<core::String, core::int> map10 = block {
+    final core::Map<core::String, core::int> #t3 = <core::String, core::int>{};
     if(self::oracle<core::String>("foo"))
-      #t3.{core::List::add}(dynVar);
+      #t3.{core::Map::[]=}("bar", 42);
+    #t3.{core::Map::[]=}("baz", null);
   } =>#t3;
-  core::Set<dynamic> set11 = block {
-    final core::Set<dynamic> #t4 = col::LinkedHashSet::•<dynamic>();
+  core::List<dynamic> list11 = block {
+    final core::List<dynamic> #t4 = <dynamic>[];
     if(self::oracle<core::String>("foo"))
-      #t4.{core::Set::add}(dynVar);
-    #t4.{core::Set::add}(null);
+      #t4.{core::List::add}(dynVar);
   } =>#t4;
-  core::List<core::List<core::int>> list12 = block {
-    final core::List<core::List<core::int>> #t5 = <core::List<core::int>>[];
+  core::Set<dynamic> set11 = block {
+    final core::Set<dynamic> #t5 = col::LinkedHashSet::•<dynamic>();
     if(self::oracle<core::String>("foo"))
-      #t5.{core::List::add}(<core::int>[42]);
+      #t5.{core::Set::add}(dynVar);
+    #t5.{core::Set::add}(null);
   } =>#t5;
-  core::Set<core::List<core::int>> set12 = block {
-    final core::Set<core::List<core::int>> #t6 = col::LinkedHashSet::•<core::List<core::int>>();
+  core::Map<core::String, dynamic> map11 = block {
+    final core::Map<core::String, dynamic> #t6 = <core::String, dynamic>{};
     if(self::oracle<core::String>("foo"))
-      #t6.{core::Set::add}(<core::int>[42]);
-    #t6.{core::Set::add}(null);
+      #t6.{core::Map::[]=}("bar", dynVar);
+    #t6.{core::Map::[]=}("baz", null);
   } =>#t6;
-  core::List<core::int> list20 = block {
-    final core::List<core::int> #t7 = <core::int>[];
+  core::List<core::List<core::int>> list12 = block {
+    final core::List<core::List<core::int>> #t7 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t8 in <core::int>[42])
-        #t7.{core::List::add}(#t8);
+      #t7.{core::List::add}(<core::int>[42]);
   } =>#t7;
-  core::Set<core::int> set20 = block {
-    final core::Set<core::int> #t9 = col::LinkedHashSet::•<core::int>();
+  core::Set<core::List<core::int>> set12 = block {
+    final core::Set<core::List<core::int>> #t8 = col::LinkedHashSet::•<core::List<core::int>>();
+    if(self::oracle<core::String>("foo"))
+      #t8.{core::Set::add}(<core::int>[42]);
+    #t8.{core::Set::add}(null);
+  } =>#t8;
+  core::Map<core::String, core::List<core::int>> map12 = block {
+    final core::Map<core::String, core::List<core::int>> #t9 = <core::String, core::List<core::int>>{};
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t10 in <core::int>[42])
-        #t9.{core::Set::add}(#t10);
-    #t9.{core::Set::add}(null);
+      #t9.{core::Map::[]=}("bar", <core::int>[42]);
+    #t9.{core::Map::[]=}("baz", null);
   } =>#t9;
+  core::List<core::int> list20 = block {
+    final core::List<core::int> #t10 = <core::int>[];
+    if(self::oracle<core::String>("foo"))
+      for (final core::int #t11 in <core::int>[42])
+        #t10.{core::List::add}(#t11);
+  } =>#t10;
+  core::Set<core::int> set20 = block {
+    final core::Set<core::int> #t12 = col::LinkedHashSet::•<core::int>();
+    if(self::oracle<core::String>("foo"))
+      for (final core::int #t13 in <core::int>[42])
+        #t12.{core::Set::add}(#t13);
+    #t12.{core::Set::add}(null);
+  } =>#t12;
+  core::Map<core::String, core::Null> map20 = <core::String, core::Null>{"baz": null};
   core::List<dynamic> list21 = block {
-    final core::List<dynamic> #t11 = <dynamic>[];
+    final core::List<dynamic> #t14 = <dynamic>[];
     if(self::oracle<core::String>("foo"))
-      for (final dynamic #t12 in <dynamic>[dynVar])
-        #t11.{core::List::add}(#t12);
-  } =>#t11;
+      for (final dynamic #t15 in <dynamic>[dynVar])
+        #t14.{core::List::add}(#t15);
+  } =>#t14;
   core::Set<dynamic> set21 = block {
-    final core::Set<dynamic> #t13 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t16 = col::LinkedHashSet::•<dynamic>();
     if(self::oracle<core::String>("foo"))
-      for (final dynamic #t14 in <dynamic>[dynVar])
-        #t13.{core::Set::add}(#t14);
-    #t13.{core::Set::add}(null);
-  } =>#t13;
+      for (final dynamic #t17 in <dynamic>[dynVar])
+        #t16.{core::Set::add}(#t17);
+    #t16.{core::Set::add}(null);
+  } =>#t16;
+  core::Map<core::String, core::Null> map21 = <core::String, core::Null>{"baz": null};
   core::List<core::List<core::int>> list22 = block {
-    final core::List<core::List<core::int>> #t15 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t18 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t16 in <core::List<core::int>>[<core::int>[42]])
-        #t15.{core::List::add}(#t16);
-  } =>#t15;
+      for (final core::List<core::int> #t19 in <core::List<core::int>>[<core::int>[42]])
+        #t18.{core::List::add}(#t19);
+  } =>#t18;
   core::Set<core::List<core::int>> set22 = block {
-    final core::Set<core::List<core::int>> #t17 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t20 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t18 in <core::List<core::int>>[<core::int>[42]])
-        #t17.{core::Set::add}(#t18);
-    #t17.{core::Set::add}(null);
-  } =>#t17;
+      for (final core::List<core::int> #t21 in <core::List<core::int>>[<core::int>[42]])
+        #t20.{core::Set::add}(#t21);
+    #t20.{core::Set::add}(null);
+  } =>#t20;
+  core::Map<core::String, core::Null> map22 = <core::String, core::Null>{"baz": null};
   core::List<core::int> list30 = block {
-    final core::List<core::int> #t19 = <core::int>[];
+    final core::List<core::int> #t22 = <core::int>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::int #t20 in <core::int>[42])
-          #t19.{core::List::add}(#t20);
-  } =>#t19;
+        for (final core::int #t23 in <core::int>[42])
+          #t22.{core::List::add}(#t23);
+  } =>#t22;
   core::Set<core::int> set30 = block {
-    final core::Set<core::int> #t21 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t24 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::int #t22 in <core::int>[42])
-          #t21.{core::Set::add}(#t22);
-    #t21.{core::Set::add}(null);
-  } =>#t21;
+        for (final core::int #t25 in <core::int>[42])
+          #t24.{core::Set::add}(#t25);
+    #t24.{core::Set::add}(null);
+  } =>#t24;
+  core::Map<core::String, core::Null> map30 = <core::String, core::Null>{"baz": null};
   core::List<dynamic> list31 = block {
-    final core::List<dynamic> #t23 = <dynamic>[];
+    final core::List<dynamic> #t26 = <dynamic>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final dynamic #t24 in <dynamic>[dynVar])
-          #t23.{core::List::add}(#t24);
-  } =>#t23;
+        for (final dynamic #t27 in <dynamic>[dynVar])
+          #t26.{core::List::add}(#t27);
+  } =>#t26;
   core::Set<dynamic> set31 = block {
-    final core::Set<dynamic> #t25 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t28 = col::LinkedHashSet::•<dynamic>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final dynamic #t26 in <dynamic>[dynVar])
-          #t25.{core::Set::add}(#t26);
-    #t25.{core::Set::add}(null);
-  } =>#t25;
+        for (final dynamic #t29 in <dynamic>[dynVar])
+          #t28.{core::Set::add}(#t29);
+    #t28.{core::Set::add}(null);
+  } =>#t28;
+  core::Map<core::String, core::Null> map31 = <core::String, core::Null>{"baz": null};
   core::List<core::List<core::int>> list33 = block {
-    final core::List<core::List<core::int>> #t27 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t30 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t28 in <core::List<core::int>>[<core::int>[42]])
-          #t27.{core::List::add}(#t28);
-  } =>#t27;
+        for (final core::List<core::int> #t31 in <core::List<core::int>>[<core::int>[42]])
+          #t30.{core::List::add}(#t31);
+  } =>#t30;
   core::Set<core::List<core::int>> set33 = block {
-    final core::Set<core::List<core::int>> #t29 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t32 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t30 in <core::List<core::int>>[<core::int>[42]])
-          #t29.{core::Set::add}(#t30);
-    #t29.{core::Set::add}(null);
-  } =>#t29;
+        for (final core::List<core::int> #t33 in <core::List<core::int>>[<core::int>[42]])
+          #t32.{core::Set::add}(#t33);
+    #t32.{core::Set::add}(null);
+  } =>#t32;
+  core::Map<core::String, core::Null> map33 = <core::String, core::Null>{"baz": null};
   core::List<core::List<core::int>> list40 = block {
-    final core::List<core::List<core::int>> #t31 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t34 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t32 in <core::List<core::int>>[<core::int>[]])
-        #t31.{core::List::add}(#t32);
-  } =>#t31;
+      for (final core::List<core::int> #t35 in <core::List<core::int>>[<core::int>[]])
+        #t34.{core::List::add}(#t35);
+  } =>#t34;
   core::Set<core::List<core::int>> set40 = block {
-    final core::Set<core::List<core::int>> #t33 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t36 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t34 in <core::List<core::int>>[<core::int>[]])
-        #t33.{core::Set::add}(#t34);
-    #t33.{core::Set::add}(null);
-  } =>#t33;
+      for (final core::List<core::int> #t37 in <core::List<core::int>>[<core::int>[]])
+        #t36.{core::Set::add}(#t37);
+    #t36.{core::Set::add}(null);
+  } =>#t36;
+  core::Map<core::String, core::List<core::int>> map40 = <core::String, core::List<core::int>>{"baz": null};
   core::List<core::List<core::int>> list41 = block {
-    final core::List<core::List<core::int>> #t35 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t38 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t36 in let final core::Set<core::List<core::int>> #t37 = col::LinkedHashSet::•<core::List<core::int>>() in let final core::bool #t38 = #t37.{core::Set::add}(<core::int>[]) in #t37)
-        #t35.{core::List::add}(#t36);
-  } =>#t35;
+      for (final core::List<core::int> #t39 in let final core::Set<core::List<core::int>> #t40 = col::LinkedHashSet::•<core::List<core::int>>() in let final core::bool #t41 = #t40.{core::Set::add}(<core::int>[]) in #t40)
+        #t38.{core::List::add}(#t39);
+  } =>#t38;
   core::Set<core::List<core::int>> set41 = block {
-    final core::Set<core::List<core::int>> #t39 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t42 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t40 in let final core::Set<core::List<core::int>> #t41 = col::LinkedHashSet::•<core::List<core::int>>() in let final core::bool #t42 = #t41.{core::Set::add}(<core::int>[]) in #t41)
-        #t39.{core::Set::add}(#t40);
-    #t39.{core::Set::add}(null);
-  } =>#t39;
+      for (final core::List<core::int> #t43 in let final core::Set<core::List<core::int>> #t44 = col::LinkedHashSet::•<core::List<core::int>>() in let final core::bool #t45 = #t44.{core::Set::add}(<core::int>[]) in #t44)
+        #t42.{core::Set::add}(#t43);
+    #t42.{core::Set::add}(null);
+  } =>#t42;
   core::List<core::List<core::int>> list42 = block {
-    final core::List<core::List<core::int>> #t43 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t46 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t44 in <core::List<core::int>>[<core::int>[]])
-          #t43.{core::List::add}(#t44);
-  } =>#t43;
+        for (final core::List<core::int> #t47 in <core::List<core::int>>[<core::int>[]])
+          #t46.{core::List::add}(#t47);
+  } =>#t46;
   core::Set<core::List<core::int>> set42 = block {
-    final core::Set<core::List<core::int>> #t45 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t48 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t46 in <core::List<core::int>>[<core::int>[]])
-          #t45.{core::Set::add}(#t46);
-    #t45.{core::Set::add}(null);
-  } =>#t45;
+        for (final core::List<core::int> #t49 in <core::List<core::int>>[<core::int>[]])
+          #t48.{core::Set::add}(#t49);
+    #t48.{core::Set::add}(null);
+  } =>#t48;
+  core::Map<core::String, core::List<core::int>> map42 = <core::String, core::List<core::int>>{"baz": null};
   core::List<core::int> list50 = block {
-    final core::List<core::int> #t47 = <core::int>[];
+    final core::List<core::int> #t50 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t48 in <core::int>[])
-        #t47.{core::List::add}(#t48);
-  } =>#t47;
+      for (final core::int #t51 in <core::int>[])
+        #t50.{core::List::add}(#t51);
+  } =>#t50;
   core::Set<core::int> set50 = block {
-    final core::Set<core::int> #t49 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t52 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t50 in <core::int>[])
-        #t49.{core::Set::add}(#t50);
-    #t49.{core::Set::add}(null);
-  } =>#t49;
+      for (final core::int #t53 in <core::int>[])
+        #t52.{core::Set::add}(#t53);
+    #t52.{core::Set::add}(null);
+  } =>#t52;
+  core::Map<dynamic, dynamic> map50 = <dynamic, dynamic>{"baz": null};
   core::List<core::int> list51 = block {
-    final core::List<core::int> #t51 = <core::int>[];
-    if(self::oracle<core::String>("foo"))
-      for (final core::int #t52 in let final core::Set<core::int> #t53 = col::LinkedHashSet::•<core::int>() in #t53)
-        #t51.{core::List::add}(#t52);
-  } =>#t51;
-  core::Set<core::int> set51 = block {
-    final core::Set<core::int> #t54 = col::LinkedHashSet::•<core::int>();
+    final core::List<core::int> #t54 = <core::int>[];
     if(self::oracle<core::String>("foo"))
       for (final core::int #t55 in let final core::Set<core::int> #t56 = col::LinkedHashSet::•<core::int>() in #t56)
-        #t54.{core::Set::add}(#t55);
-    #t54.{core::Set::add}(null);
+        #t54.{core::List::add}(#t55);
   } =>#t54;
+  core::Set<core::int> set51 = block {
+    final core::Set<core::int> #t57 = col::LinkedHashSet::•<core::int>();
+    if(self::oracle<core::String>("foo"))
+      for (final core::int #t58 in let final core::Set<core::int> #t59 = col::LinkedHashSet::•<core::int>() in #t59)
+        #t57.{core::Set::add}(#t58);
+    #t57.{core::Set::add}(null);
+  } =>#t57;
   core::List<core::int> list52 = block {
-    final core::List<core::int> #t57 = <core::int>[];
+    final core::List<core::int> #t60 = <core::int>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::int #t58 in <core::int>[])
-          #t57.{core::List::add}(#t58);
-  } =>#t57;
+        for (final core::int #t61 in <core::int>[])
+          #t60.{core::List::add}(#t61);
+  } =>#t60;
   core::Set<core::int> set52 = block {
-    final core::Set<core::int> #t59 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t62 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::int #t60 in <core::int>[])
-          #t59.{core::Set::add}(#t60);
-    #t59.{core::Set::add}(null);
-  } =>#t59;
+        for (final core::int #t63 in <core::int>[])
+          #t62.{core::Set::add}(#t63);
+    #t62.{core::Set::add}(null);
+  } =>#t62;
+  core::Map<core::String, core::int> map52 = <core::String, core::int>{"baz": null};
   core::List<core::List<core::int>> list60 = block {
-    final core::List<core::List<core::int>> #t61 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t64 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t62 in <core::List<core::int>>[<core::int>[]])
-        #t61.{core::List::add}(#t62);
-  } =>#t61;
+      for (final core::List<core::int> #t65 in <core::List<core::int>>[<core::int>[]])
+        #t64.{core::List::add}(#t65);
+  } =>#t64;
   core::Set<core::List<core::int>> set60 = block {
-    final core::Set<core::List<core::int>> #t63 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t66 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      for (final core::List<core::int> #t64 in <core::List<core::int>>[<core::int>[]])
-        #t63.{core::Set::add}(#t64);
-    #t63.{core::Set::add}(null);
-  } =>#t63;
+      for (final core::List<core::int> #t67 in <core::List<core::int>>[<core::int>[]])
+        #t66.{core::Set::add}(#t67);
+    #t66.{core::Set::add}(null);
+  } =>#t66;
+  core::Map<core::String, core::List<core::int>> map60 = <core::String, core::List<core::int>>{"baz": null};
   core::List<core::List<core::int>> list61 = block {
-    final core::List<core::List<core::int>> #t65 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t68 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t66 in <core::List<core::int>>[<core::int>[]])
-          #t65.{core::List::add}(#t66);
-  } =>#t65;
+        for (final core::List<core::int> #t69 in <core::List<core::int>>[<core::int>[]])
+          #t68.{core::List::add}(#t69);
+  } =>#t68;
   core::Set<core::List<core::int>> set61 = block {
-    final core::Set<core::List<core::int>> #t67 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t70 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t68 in <core::List<core::int>>[<core::int>[]])
-          #t67.{core::Set::add}(#t68);
-    #t67.{core::Set::add}(null);
-  } =>#t67;
+        for (final core::List<core::int> #t71 in <core::List<core::int>>[<core::int>[]])
+          #t70.{core::Set::add}(#t71);
+    #t70.{core::Set::add}(null);
+  } =>#t70;
+  core::Map<core::String, core::List<core::int>> map61 = <core::String, core::List<core::int>>{"baz": null};
   core::List<core::List<core::int>> list70 = block {
-    final core::List<core::List<core::int>> #t69 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t72 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
-      #t69.{core::List::add}(<core::int>[]);
-  } =>#t69;
+      #t72.{core::List::add}(<core::int>[]);
+  } =>#t72;
   core::Set<core::List<core::int>> set70 = block {
-    final core::Set<core::List<core::int>> #t70 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t73 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
-      #t70.{core::Set::add}(<core::int>[]);
-    #t70.{core::Set::add}(null);
-  } =>#t70;
+      #t73.{core::Set::add}(<core::int>[]);
+    #t73.{core::Set::add}(null);
+  } =>#t73;
   core::List<core::List<core::int>> list71 = block {
-    final core::List<core::List<core::int>> #t71 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t74 = <core::List<core::int>>[];
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        #t71.{core::List::add}(<core::int>[]);
-  } =>#t71;
+        #t74.{core::List::add}(<core::int>[]);
+  } =>#t74;
   core::Set<core::List<core::int>> set71 = block {
-    final core::Set<core::List<core::int>> #t72 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t75 = col::LinkedHashSet::•<core::List<core::int>>();
     if(self::oracle<core::String>("foo"))
       if(self::oracle<dynamic>())
-        #t72.{core::Set::add}(<core::int>[]);
-    #t72.{core::Set::add}(null);
-  } =>#t72;
+        #t75.{core::Set::add}(<core::int>[]);
+    #t75.{core::Set::add}(null);
+  } =>#t75;
   core::List<core::num> list80 = block {
-    final core::List<core::num> #t73 = <core::num>[];
+    final core::List<core::num> #t76 = <core::num>[];
     if(self::oracle<core::String>("foo"))
-      #t73.{core::List::add}(42);
+      #t76.{core::List::add}(42);
     else
-      #t73.{core::List::add}(3.14);
-  } =>#t73;
+      #t76.{core::List::add}(3.14);
+  } =>#t76;
   core::Set<core::num> set80 = block {
-    final core::Set<core::num> #t74 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t77 = col::LinkedHashSet::•<core::num>();
     if(self::oracle<core::String>("foo"))
-      #t74.{core::Set::add}(42);
+      #t77.{core::Set::add}(42);
     else
-      #t74.{core::Set::add}(3.14);
-    #t74.{core::Set::add}(null);
-  } =>#t74;
+      #t77.{core::Set::add}(3.14);
+    #t77.{core::Set::add}(null);
+  } =>#t77;
+  core::Map<core::String, core::num> map80 = block {
+    final core::Map<core::String, core::num> #t78 = <core::String, core::num>{};
+    if(self::oracle<core::String>("foo"))
+      #t78.{core::Map::[]=}("bar", 42);
+    else
+      #t78.{core::Map::[]=}("bar", 3.14);
+    #t78.{core::Map::[]=}("baz", null);
+  } =>#t78;
   core::List<core::num> list81 = block {
-    final core::List<core::num> #t75 = <core::num>[];
+    final core::List<core::num> #t79 = <core::num>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::num #t76 in listInt)
-        #t75.{core::List::add}(#t76);
+      for (final core::num #t80 in listInt)
+        #t79.{core::List::add}(#t80);
     else
-      for (final core::num #t77 in listDouble)
-        #t75.{core::List::add}(#t77);
-  } =>#t75;
+      for (final core::num #t81 in listDouble)
+        #t79.{core::List::add}(#t81);
+  } =>#t79;
   core::Set<core::num> set81 = block {
-    final core::Set<core::num> #t78 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t82 = col::LinkedHashSet::•<core::num>();
     if(self::oracle<core::String>("foo"))
-      for (final core::num #t79 in listInt)
-        #t78.{core::Set::add}(#t79);
+      for (final core::num #t83 in listInt)
+        #t82.{core::Set::add}(#t83);
     else
-      for (final core::num #t80 in listDouble)
-        #t78.{core::Set::add}(#t80);
-    #t78.{core::Set::add}(null);
-  } =>#t78;
+      for (final core::num #t84 in listDouble)
+        #t82.{core::Set::add}(#t84);
+    #t82.{core::Set::add}(null);
+  } =>#t82;
+  core::Set<dynamic> map81 = block {
+    final core::Set<dynamic> #t85 = col::LinkedHashSet::•<dynamic>();
+    if(self::oracle<core::String>("foo"))
+      #t85.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:68:38: Error: Unexpected type 'Map<String, double>' of a spread.  Expected 'dynamic' or an Iterable.
+ - 'Map' is from 'dart:core'.
+  var map81 = {if (oracle(\"foo\")) ...mapToInt else ...mapToDouble, null};
+                                     ^");
+    else
+      #t85.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:68:55: Error: Unexpected type 'Map<String, double>' of a spread.  Expected 'dynamic' or an Iterable.
+ - 'Map' is from 'dart:core'.
+  var map81 = {if (oracle(\"foo\")) ...mapToInt else ...mapToDouble, null};
+                                                      ^");
+    #t85.{core::Set::add}(null);
+  } =>#t85;
   core::List<dynamic> list82 = block {
-    final core::List<dynamic> #t81 = <dynamic>[];
+    final core::List<dynamic> #t86 = <dynamic>[];
     if(self::oracle<core::String>("foo"))
-      for (final dynamic #t82 in listInt as{TypeError} core::Iterable<dynamic>)
-        #t81.{core::List::add}(#t82);
+      for (final dynamic #t87 in listInt as{TypeError} core::Iterable<dynamic>)
+        #t86.{core::List::add}(#t87);
     else
-      for (final dynamic #t83 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t81.{core::List::add}(#t83);
-  } =>#t81;
+      for (final dynamic #t88 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t86.{core::List::add}(#t88);
+  } =>#t86;
   core::Set<dynamic> set82 = block {
-    final core::Set<dynamic> #t84 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t89 = col::LinkedHashSet::•<dynamic>();
     if(self::oracle<core::String>("foo"))
-      for (final dynamic #t85 in listInt as{TypeError} core::Iterable<dynamic>)
-        #t84.{core::Set::add}(#t85);
+      for (final dynamic #t90 in listInt as{TypeError} core::Iterable<dynamic>)
+        #t89.{core::Set::add}(#t90);
+    else
+      for (final dynamic #t91 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t89.{core::Set::add}(#t91);
+    #t89.{core::Set::add}(null);
+  } =>#t89;
+  core::Set<dynamic> map82 = block {
+    final core::Set<dynamic> #t92 = col::LinkedHashSet::•<dynamic>();
+    if(self::oracle<core::String>("foo"))
+      for (final dynamic #t93 in mapToInt as{TypeError} core::Iterable<dynamic>)
+        #t92.{core::Set::add}(#t93);
     else
-      for (final dynamic #t86 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t84.{core::Set::add}(#t86);
-    #t84.{core::Set::add}(null);
-  } =>#t84;
+      for (final dynamic #t94 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t92.{core::Set::add}(#t94);
+    #t92.{core::Set::add}(null);
+  } =>#t92;
   core::List<core::num> list83 = block {
-    final core::List<core::num> #t87 = <core::num>[];
+    final core::List<core::num> #t95 = <core::num>[];
     if(self::oracle<core::String>("foo"))
-      #t87.{core::List::add}(42);
+      #t95.{core::List::add}(42);
     else
-      for (final core::num #t88 in listDouble)
-        #t87.{core::List::add}(#t88);
-  } =>#t87;
+      for (final core::num #t96 in listDouble)
+        #t95.{core::List::add}(#t96);
+  } =>#t95;
   core::Set<core::num> set83 = block {
-    final core::Set<core::num> #t89 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t97 = col::LinkedHashSet::•<core::num>();
     if(self::oracle<core::String>("foo"))
-      for (final core::num #t90 in listInt)
-        #t89.{core::Set::add}(#t90);
+      for (final core::num #t98 in listInt)
+        #t97.{core::Set::add}(#t98);
     else
-      #t89.{core::Set::add}(3.14);
-    #t89.{core::Set::add}(null);
-  } =>#t89;
+      #t97.{core::Set::add}(3.14);
+    #t97.{core::Set::add}(null);
+  } =>#t97;
+  core::Set<dynamic> map83 = block {
+    final core::Set<dynamic> #t99 = col::LinkedHashSet::•<dynamic>();
+    if(self::oracle<core::String>("foo"))
+      #t99.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:74:38: Error: Unexpected type 'Map<String, int>' of a spread.  Expected 'dynamic' or an Iterable.
+ - 'Map' is from 'dart:core'.
+  var map83 = {if (oracle(\"foo\")) ...mapToInt else 3.14, null};
+                                     ^");
+    else
+      #t99.{core::Set::add}(3.14);
+    #t99.{core::Set::add}(null);
+  } =>#t99;
   core::List<core::int> list90 = block {
-    final core::List<core::int> #t91 = <core::int>[];
+    final core::List<core::int> #t100 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      #t91.{core::List::add}(dynVar as{TypeError} core::int);
-  } =>#t91;
+      #t100.{core::List::add}(dynVar as{TypeError} core::int);
+  } =>#t100;
   core::Set<core::int> set90 = block {
-    final core::Set<core::int> #t92 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t101 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      #t92.{core::Set::add}(dynVar as{TypeError} core::int);
-    #t92.{core::Set::add}(null);
-  } =>#t92;
+      #t101.{core::Set::add}(dynVar as{TypeError} core::int);
+    #t101.{core::Set::add}(null);
+  } =>#t101;
+  core::Map<core::String, core::int> map90 = block {
+    final core::Map<core::String, core::int> #t102 = <core::String, core::int>{};
+    if(self::oracle<core::String>("foo"))
+      #t102.{core::Map::[]=}("bar", dynVar);
+    #t102.{core::Map::[]=}("baz", null);
+  } =>#t102;
   core::List<core::int> list91 = block {
-    final core::List<core::int> #t93 = <core::int>[];
+    final core::List<core::int> #t103 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t94 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t93.{core::List::add}(#t94);
-  } =>#t93;
+      for (final core::int #t104 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t103.{core::List::add}(#t104);
+  } =>#t103;
   core::Set<core::int> set91 = block {
-    final core::Set<core::int> #t95 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t105 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t96 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t95.{core::Set::add}(#t96);
-    #t95.{core::Set::add}(null);
-  } =>#t95;
+      for (final core::int #t106 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t105.{core::Set::add}(#t106);
+    #t105.{core::Set::add}(null);
+  } =>#t105;
+  core::Map<core::String, core::int> map91 = <core::String, core::int>{"baz": null};
 }
 static method testIfElementErrors(core::Map<core::int, core::int> map) → dynamic {
-  <core::int>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:62:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+  <core::int>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:84:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>[if (oracle(\"foo\")) \"bar\"];
                            ^"];
-  let final core::Set<core::int> #t97 = col::LinkedHashSet::•<core::int>() in let final core::bool #t98 = #t97.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:63:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+  let final core::Set<core::int> #t107 = col::LinkedHashSet::•<core::int>() in let final core::bool #t108 = #t107.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:85:28: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>{if (oracle(\"foo\")) \"bar\", null};
-                           ^") in let final core::bool #t99 = #t97.{core::Set::add}(null) in #t97;
+                           ^") in let final core::bool #t109 = #t107.{core::Set::add}(null) in #t107;
+  <core::String, core::int>{null: invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:86:41: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+Try changing the type of the left hand side, or casting the right hand side to 'int'.
+  <String, int>{if (oracle(\"foo\")) \"bar\": \"bar\", \"baz\": null};
+                                        ^", "baz": null};
   block {
-    final core::List<core::int> #t100 = <core::int>[];
+    final core::List<core::int> #t110 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t101 in <core::int>[let final<BottomType> #t102 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:64:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+      for (final core::int #t111 in <core::int>[let final<BottomType> #t112 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:87:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>[if (oracle(\"foo\")) ...[\"bar\"]];
                                ^" in "bar" as{TypeError} core::int])
-        #t100.{core::List::add}(#t101);
-  } =>#t100;
+        #t110.{core::List::add}(#t111);
+  } =>#t110;
   block {
-    final core::Set<core::int> #t103 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t113 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      for (final core::int #t104 in <core::int>[let final<BottomType> #t105 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:65:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+      for (final core::int #t114 in <core::int>[let final<BottomType> #t115 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:88:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>{if (oracle(\"foo\")) ...[\"bar\"], null};
                                ^" in "bar" as{TypeError} core::int])
-        #t103.{core::Set::add}(#t104);
-    #t103.{core::Set::add}(null);
-  } =>#t103;
+        #t113.{core::Set::add}(#t114);
+    #t113.{core::Set::add}(null);
+  } =>#t113;
+  <core::String, core::int>{"baz": null};
   block {
-    final core::List<core::int> #t106 = <core::int>[];
+    final core::List<core::int> #t116 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      #t106.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:66:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t116.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:90:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[if (oracle(\"foo\")) ...map];
                               ^");
-  } =>#t106;
+  } =>#t116;
   block {
-    final core::Set<core::int> #t107 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t117 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      #t107.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:67:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t117.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:91:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{if (oracle(\"foo\")) ...map, null};
                               ^");
-    #t107.{core::Set::add}(null);
-  } =>#t107;
-  <core::String>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:68:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+    #t117.{core::Set::add}(null);
+  } =>#t117;
+  <core::String, core::int>{"baz": null};
+  <core::String>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:93:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 Try changing the type of the left hand side, or casting the right hand side to 'String'.
   <String>[if (oracle(\"foo\")) 42 else 3.14];
            ^"];
-  let final core::Set<core::String> #t108 = col::LinkedHashSet::•<core::String>() in let final core::bool #t109 = #t108.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:69:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+  let final core::Set<core::String> #t118 = col::LinkedHashSet::•<core::String>() in let final core::bool #t119 = #t118.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:94:12: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 Try changing the type of the left hand side, or casting the right hand side to 'String'.
   <String>{if (oracle(\"foo\")) 42 else 3.14, null};
-           ^") in let final core::bool #t110 = #t108.{core::Set::add}(null) in #t108;
+           ^") in let final core::bool #t120 = #t118.{core::Set::add}(null) in #t118;
+  <core::String, core::String>{null: invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:95:20: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+Try changing the type of the left hand side, or casting the right hand side to 'String'.
+  <String, String>{if (oracle(\"foo\")) \"bar\": 42 else \"baz\": 3.14, \"baz\": null};
+                   ^", "baz": null};
   block {
-    final core::List<core::int> #t111 = <core::int>[];
+    final core::List<core::int> #t121 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      #t111.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:70:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t121.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:96:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[if (oracle(\"foo\")) ...map else 42];
                               ^");
     else
-      #t111.{core::List::add}(42 as{TypeError} core::int);
-  } =>#t111;
+      #t121.{core::List::add}(42 as{TypeError} core::int);
+  } =>#t121;
   block {
-    final core::Set<core::int> #t112 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t122 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      #t112.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:71:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t122.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:97:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{if (oracle(\"foo\")) ...map else 42, null};
                               ^");
     else
-      #t112.{core::Set::add}(42 as{TypeError} core::int);
-    #t112.{core::Set::add}(null);
-  } =>#t112;
+      #t122.{core::Set::add}(42 as{TypeError} core::int);
+    #t122.{core::Set::add}(null);
+  } =>#t122;
+  <core::String, core::int>{"baz": null};
   block {
-    final core::List<core::int> #t113 = <core::int>[];
+    final core::List<core::int> #t123 = <core::int>[];
     if(self::oracle<core::String>("foo"))
-      #t113.{core::List::add}(42 as{TypeError} core::int);
+      #t123.{core::List::add}(42 as{TypeError} core::int);
     else
-      #t113.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:72:39: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t123.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:99:39: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[if (oracle(\"foo\")) 42 else ...map];
                                       ^");
-  } =>#t113;
+  } =>#t123;
   block {
-    final core::Set<core::int> #t114 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t124 = col::LinkedHashSet::•<core::int>();
     if(self::oracle<core::String>("foo"))
-      #t114.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:73:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+      #t124.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:100:31: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{if (oracle(\"foo\")) ...map else 42, null};
                               ^");
     else
-      #t114.{core::Set::add}(42 as{TypeError} core::int);
-    #t114.{core::Set::add}(null);
-  } =>#t114;
+      #t124.{core::Set::add}(42 as{TypeError} core::int);
+    #t124.{core::Set::add}(null);
+  } =>#t124;
+  <core::String, core::int>{"baz": null};
 }
 static method testForElement(dynamic dynVar, core::List<core::int> listInt, core::List<core::double> listDouble, core::int index) → dynamic {
   core::List<core::int> list10 = block {
-    final core::List<core::int> #t115 = <core::int>[];
+    final core::List<core::int> #t125 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t115.{core::List::add}(42);
-  } =>#t115;
+      #t125.{core::List::add}(42);
+  } =>#t125;
   core::Set<core::int> set10 = block {
-    final core::Set<core::int> #t116 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t126 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t116.{core::Set::add}(42);
-    #t116.{core::Set::add}(null);
-  } =>#t116;
+      #t126.{core::Set::add}(42);
+    #t126.{core::Set::add}(null);
+  } =>#t126;
   core::List<dynamic> list11 = block {
-    final core::List<dynamic> #t117 = <dynamic>[];
+    final core::List<dynamic> #t127 = <dynamic>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t117.{core::List::add}(dynVar);
-  } =>#t117;
+      #t127.{core::List::add}(dynVar);
+  } =>#t127;
   core::Set<dynamic> set11 = block {
-    final core::Set<dynamic> #t118 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t128 = col::LinkedHashSet::•<dynamic>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t118.{core::Set::add}(dynVar);
-    #t118.{core::Set::add}(null);
-  } =>#t118;
+      #t128.{core::Set::add}(dynVar);
+    #t128.{core::Set::add}(null);
+  } =>#t128;
   core::List<core::List<core::int>> list12 = block {
-    final core::List<core::List<core::int>> #t119 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t129 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t119.{core::List::add}(<core::int>[42]);
-  } =>#t119;
+      #t129.{core::List::add}(<core::int>[42]);
+  } =>#t129;
   core::Set<core::List<core::int>> set12 = block {
-    final core::Set<core::List<core::int>> #t120 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t130 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t120.{core::Set::add}(<core::int>[42]);
-    #t120.{core::Set::add}(null);
-  } =>#t120;
+      #t130.{core::Set::add}(<core::int>[42]);
+    #t130.{core::Set::add}(null);
+  } =>#t130;
   core::List<core::int> list20 = block {
-    final core::List<core::int> #t121 = <core::int>[];
+    final core::List<core::int> #t131 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t122 in <core::int>[42])
-        #t121.{core::List::add}(#t122);
-  } =>#t121;
+      for (final core::int #t132 in <core::int>[42])
+        #t131.{core::List::add}(#t132);
+  } =>#t131;
   core::Set<core::int> set20 = block {
-    final core::Set<core::int> #t123 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t133 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t124 in <core::int>[42])
-        #t123.{core::Set::add}(#t124);
-    #t123.{core::Set::add}(null);
-  } =>#t123;
+      for (final core::int #t134 in <core::int>[42])
+        #t133.{core::Set::add}(#t134);
+    #t133.{core::Set::add}(null);
+  } =>#t133;
   core::List<dynamic> list21 = block {
-    final core::List<dynamic> #t125 = <dynamic>[];
+    final core::List<dynamic> #t135 = <dynamic>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final dynamic #t126 in <dynamic>[dynVar])
-        #t125.{core::List::add}(#t126);
-  } =>#t125;
+      for (final dynamic #t136 in <dynamic>[dynVar])
+        #t135.{core::List::add}(#t136);
+  } =>#t135;
   core::Set<dynamic> set21 = block {
-    final core::Set<dynamic> #t127 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t137 = col::LinkedHashSet::•<dynamic>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final dynamic #t128 in <dynamic>[dynVar])
-        #t127.{core::Set::add}(#t128);
-    #t127.{core::Set::add}(null);
-  } =>#t127;
+      for (final dynamic #t138 in <dynamic>[dynVar])
+        #t137.{core::Set::add}(#t138);
+    #t137.{core::Set::add}(null);
+  } =>#t137;
   core::List<core::List<core::int>> list22 = block {
-    final core::List<core::List<core::int>> #t129 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t139 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t130 in <core::List<core::int>>[<core::int>[42]])
-        #t129.{core::List::add}(#t130);
-  } =>#t129;
+      for (final core::List<core::int> #t140 in <core::List<core::int>>[<core::int>[42]])
+        #t139.{core::List::add}(#t140);
+  } =>#t139;
   core::Set<core::List<core::int>> set22 = block {
-    final core::Set<core::List<core::int>> #t131 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t141 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t132 in <core::List<core::int>>[<core::int>[42]])
-        #t131.{core::Set::add}(#t132);
-    #t131.{core::Set::add}(null);
-  } =>#t131;
+      for (final core::List<core::int> #t142 in <core::List<core::int>>[<core::int>[42]])
+        #t141.{core::Set::add}(#t142);
+    #t141.{core::Set::add}(null);
+  } =>#t141;
   core::List<core::int> list30 = block {
-    final core::List<core::int> #t133 = <core::int>[];
+    final core::List<core::int> #t143 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::int #t134 in <core::int>[42])
-          #t133.{core::List::add}(#t134);
-  } =>#t133;
+        for (final core::int #t144 in <core::int>[42])
+          #t143.{core::List::add}(#t144);
+  } =>#t143;
   core::Set<core::int> set30 = block {
-    final core::Set<core::int> #t135 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t145 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::int #t136 in <core::int>[42])
-          #t135.{core::Set::add}(#t136);
-    #t135.{core::Set::add}(null);
-  } =>#t135;
+        for (final core::int #t146 in <core::int>[42])
+          #t145.{core::Set::add}(#t146);
+    #t145.{core::Set::add}(null);
+  } =>#t145;
   core::List<dynamic> list31 = block {
-    final core::List<dynamic> #t137 = <dynamic>[];
+    final core::List<dynamic> #t147 = <dynamic>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final dynamic #t138 in <dynamic>[dynVar])
-          #t137.{core::List::add}(#t138);
-  } =>#t137;
+        for (final dynamic #t148 in <dynamic>[dynVar])
+          #t147.{core::List::add}(#t148);
+  } =>#t147;
   core::Set<dynamic> set31 = block {
-    final core::Set<dynamic> #t139 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t149 = col::LinkedHashSet::•<dynamic>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final dynamic #t140 in <dynamic>[dynVar])
-          #t139.{core::Set::add}(#t140);
-    #t139.{core::Set::add}(null);
-  } =>#t139;
+        for (final dynamic #t150 in <dynamic>[dynVar])
+          #t149.{core::Set::add}(#t150);
+    #t149.{core::Set::add}(null);
+  } =>#t149;
   core::List<core::List<core::int>> list33 = block {
-    final core::List<core::List<core::int>> #t141 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t151 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t142 in <core::List<core::int>>[<core::int>[42]])
-          #t141.{core::List::add}(#t142);
-  } =>#t141;
+        for (final core::List<core::int> #t152 in <core::List<core::int>>[<core::int>[42]])
+          #t151.{core::List::add}(#t152);
+  } =>#t151;
   core::Set<core::List<core::int>> set33 = block {
-    final core::Set<core::List<core::int>> #t143 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t153 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t144 in <core::List<core::int>>[<core::int>[42]])
-          #t143.{core::Set::add}(#t144);
-    #t143.{core::Set::add}(null);
-  } =>#t143;
+        for (final core::List<core::int> #t154 in <core::List<core::int>>[<core::int>[42]])
+          #t153.{core::Set::add}(#t154);
+    #t153.{core::Set::add}(null);
+  } =>#t153;
   core::List<core::List<core::int>> list40 = block {
-    final core::List<core::List<core::int>> #t145 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t155 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t146 in <core::List<core::int>>[<core::int>[]])
-        #t145.{core::List::add}(#t146);
-  } =>#t145;
+      for (final core::List<core::int> #t156 in <core::List<core::int>>[<core::int>[]])
+        #t155.{core::List::add}(#t156);
+  } =>#t155;
   core::Set<core::List<core::int>> set40 = block {
-    final core::Set<core::List<core::int>> #t147 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t157 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t148 in <core::List<core::int>>[<core::int>[]])
-        #t147.{core::Set::add}(#t148);
-    #t147.{core::Set::add}(null);
-  } =>#t147;
+      for (final core::List<core::int> #t158 in <core::List<core::int>>[<core::int>[]])
+        #t157.{core::Set::add}(#t158);
+    #t157.{core::Set::add}(null);
+  } =>#t157;
   core::List<core::List<core::int>> list41 = block {
-    final core::List<core::List<core::int>> #t149 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t159 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t150 in let final core::Set<core::List<core::int>> #t151 = col::LinkedHashSet::•<core::List<core::int>>() in let final core::bool #t152 = #t151.{core::Set::add}(<core::int>[]) in #t151)
-        #t149.{core::List::add}(#t150);
-  } =>#t149;
+      for (final core::List<core::int> #t160 in let final core::Set<core::List<core::int>> #t161 = col::LinkedHashSet::•<core::List<core::int>>() in let final core::bool #t162 = #t161.{core::Set::add}(<core::int>[]) in #t161)
+        #t159.{core::List::add}(#t160);
+  } =>#t159;
   core::Set<core::List<core::int>> set41 = block {
-    final core::Set<core::List<core::int>> #t153 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t163 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t154 in let final core::Set<core::List<core::int>> #t155 = col::LinkedHashSet::•<core::List<core::int>>() in let final core::bool #t156 = #t155.{core::Set::add}(<core::int>[]) in #t155)
-        #t153.{core::Set::add}(#t154);
-    #t153.{core::Set::add}(null);
-  } =>#t153;
+      for (final core::List<core::int> #t164 in let final core::Set<core::List<core::int>> #t165 = col::LinkedHashSet::•<core::List<core::int>>() in let final core::bool #t166 = #t165.{core::Set::add}(<core::int>[]) in #t165)
+        #t163.{core::Set::add}(#t164);
+    #t163.{core::Set::add}(null);
+  } =>#t163;
   core::List<core::List<core::int>> list42 = block {
-    final core::List<core::List<core::int>> #t157 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t167 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t158 in <core::List<core::int>>[<core::int>[]])
-          #t157.{core::List::add}(#t158);
-  } =>#t157;
+        for (final core::List<core::int> #t168 in <core::List<core::int>>[<core::int>[]])
+          #t167.{core::List::add}(#t168);
+  } =>#t167;
   core::Set<core::List<core::int>> set42 = block {
-    final core::Set<core::List<core::int>> #t159 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t169 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t160 in <core::List<core::int>>[<core::int>[]])
-          #t159.{core::Set::add}(#t160);
-    #t159.{core::Set::add}(null);
-  } =>#t159;
+        for (final core::List<core::int> #t170 in <core::List<core::int>>[<core::int>[]])
+          #t169.{core::Set::add}(#t170);
+    #t169.{core::Set::add}(null);
+  } =>#t169;
   core::List<core::int> list50 = block {
-    final core::List<core::int> #t161 = <core::int>[];
+    final core::List<core::int> #t171 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t162 in <core::int>[])
-        #t161.{core::List::add}(#t162);
-  } =>#t161;
+      for (final core::int #t172 in <core::int>[])
+        #t171.{core::List::add}(#t172);
+  } =>#t171;
   core::Set<core::int> set50 = block {
-    final core::Set<core::int> #t163 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t173 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t164 in <core::int>[])
-        #t163.{core::Set::add}(#t164);
-    #t163.{core::Set::add}(null);
-  } =>#t163;
+      for (final core::int #t174 in <core::int>[])
+        #t173.{core::Set::add}(#t174);
+    #t173.{core::Set::add}(null);
+  } =>#t173;
   core::List<core::int> list51 = block {
-    final core::List<core::int> #t165 = <core::int>[];
+    final core::List<core::int> #t175 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t166 in let final core::Set<core::int> #t167 = col::LinkedHashSet::•<core::int>() in #t167)
-        #t165.{core::List::add}(#t166);
-  } =>#t165;
+      for (final core::int #t176 in let final core::Set<core::int> #t177 = col::LinkedHashSet::•<core::int>() in #t177)
+        #t175.{core::List::add}(#t176);
+  } =>#t175;
   core::Set<core::int> set51 = block {
-    final core::Set<core::int> #t168 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t178 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t169 in let final core::Set<core::int> #t170 = col::LinkedHashSet::•<core::int>() in #t170)
-        #t168.{core::Set::add}(#t169);
-    #t168.{core::Set::add}(null);
-  } =>#t168;
+      for (final core::int #t179 in let final core::Set<core::int> #t180 = col::LinkedHashSet::•<core::int>() in #t180)
+        #t178.{core::Set::add}(#t179);
+    #t178.{core::Set::add}(null);
+  } =>#t178;
   core::List<core::int> list52 = block {
-    final core::List<core::int> #t171 = <core::int>[];
+    final core::List<core::int> #t181 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::int #t172 in <core::int>[])
-          #t171.{core::List::add}(#t172);
-  } =>#t171;
+        for (final core::int #t182 in <core::int>[])
+          #t181.{core::List::add}(#t182);
+  } =>#t181;
   core::Set<core::int> set52 = block {
-    final core::Set<core::int> #t173 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t183 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::int #t174 in <core::int>[])
-          #t173.{core::Set::add}(#t174);
-    #t173.{core::Set::add}(null);
-  } =>#t173;
+        for (final core::int #t184 in <core::int>[])
+          #t183.{core::Set::add}(#t184);
+    #t183.{core::Set::add}(null);
+  } =>#t183;
   core::List<core::List<core::int>> list60 = block {
-    final core::List<core::List<core::int>> #t175 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t185 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t176 in <core::List<core::int>>[<core::int>[]])
-        #t175.{core::List::add}(#t176);
-  } =>#t175;
+      for (final core::List<core::int> #t186 in <core::List<core::int>>[<core::int>[]])
+        #t185.{core::List::add}(#t186);
+  } =>#t185;
   core::Set<core::List<core::int>> set60 = block {
-    final core::Set<core::List<core::int>> #t177 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t187 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::List<core::int> #t178 in <core::List<core::int>>[<core::int>[]])
-        #t177.{core::Set::add}(#t178);
-    #t177.{core::Set::add}(null);
-  } =>#t177;
+      for (final core::List<core::int> #t188 in <core::List<core::int>>[<core::int>[]])
+        #t187.{core::Set::add}(#t188);
+    #t187.{core::Set::add}(null);
+  } =>#t187;
   core::List<core::List<core::int>> list61 = block {
-    final core::List<core::List<core::int>> #t179 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t189 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t180 in <core::List<core::int>>[<core::int>[]])
-          #t179.{core::List::add}(#t180);
-  } =>#t179;
+        for (final core::List<core::int> #t190 in <core::List<core::int>>[<core::int>[]])
+          #t189.{core::List::add}(#t190);
+  } =>#t189;
   core::Set<core::List<core::int>> set61 = block {
-    final core::Set<core::List<core::int>> #t181 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t191 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::List<core::int> #t182 in <core::List<core::int>>[<core::int>[]])
-          #t181.{core::Set::add}(#t182);
-    #t181.{core::Set::add}(null);
-  } =>#t181;
+        for (final core::List<core::int> #t192 in <core::List<core::int>>[<core::int>[]])
+          #t191.{core::Set::add}(#t192);
+    #t191.{core::Set::add}(null);
+  } =>#t191;
   core::List<core::List<core::int>> list70 = block {
-    final core::List<core::List<core::int>> #t183 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t193 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t183.{core::List::add}(<core::int>[]);
-  } =>#t183;
+      #t193.{core::List::add}(<core::int>[]);
+  } =>#t193;
   core::Set<core::List<core::int>> set70 = block {
-    final core::Set<core::List<core::int>> #t184 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t194 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t184.{core::Set::add}(<core::int>[]);
-    #t184.{core::Set::add}(null);
-  } =>#t184;
+      #t194.{core::Set::add}(<core::int>[]);
+    #t194.{core::Set::add}(null);
+  } =>#t194;
   core::List<core::List<core::int>> list71 = block {
-    final core::List<core::List<core::int>> #t185 = <core::List<core::int>>[];
+    final core::List<core::List<core::int>> #t195 = <core::List<core::int>>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t185.{core::List::add}(<core::int>[]);
-  } =>#t185;
+        #t195.{core::List::add}(<core::int>[]);
+  } =>#t195;
   core::Set<core::List<core::int>> set71 = block {
-    final core::Set<core::List<core::int>> #t186 = col::LinkedHashSet::•<core::List<core::int>>();
+    final core::Set<core::List<core::int>> #t196 = col::LinkedHashSet::•<core::List<core::int>>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t186.{core::Set::add}(<core::int>[]);
-    #t186.{core::Set::add}(null);
-  } =>#t186;
+        #t196.{core::Set::add}(<core::int>[]);
+    #t196.{core::Set::add}(null);
+  } =>#t196;
   core::List<core::num> list80 = block {
-    final core::List<core::num> #t187 = <core::num>[];
+    final core::List<core::num> #t197 = <core::num>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t187.{core::List::add}(42);
+        #t197.{core::List::add}(42);
       else
-        #t187.{core::List::add}(3.14);
-  } =>#t187;
+        #t197.{core::List::add}(3.14);
+  } =>#t197;
   core::Set<core::num> set80 = block {
-    final core::Set<core::num> #t188 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t198 = col::LinkedHashSet::•<core::num>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t188.{core::Set::add}(42);
+        #t198.{core::Set::add}(42);
       else
-        #t188.{core::Set::add}(3.14);
-    #t188.{core::Set::add}(null);
-  } =>#t188;
+        #t198.{core::Set::add}(3.14);
+    #t198.{core::Set::add}(null);
+  } =>#t198;
   core::List<core::num> list81 = block {
-    final core::List<core::num> #t189 = <core::num>[];
+    final core::List<core::num> #t199 = <core::num>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::num #t190 in listInt)
-          #t189.{core::List::add}(#t190);
+        for (final core::num #t200 in listInt)
+          #t199.{core::List::add}(#t200);
       else
-        for (final core::num #t191 in listDouble)
-          #t189.{core::List::add}(#t191);
-  } =>#t189;
+        for (final core::num #t201 in listDouble)
+          #t199.{core::List::add}(#t201);
+  } =>#t199;
   core::Set<core::num> set81 = block {
-    final core::Set<core::num> #t192 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t202 = col::LinkedHashSet::•<core::num>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::num #t193 in listInt)
-          #t192.{core::Set::add}(#t193);
+        for (final core::num #t203 in listInt)
+          #t202.{core::Set::add}(#t203);
       else
-        for (final core::num #t194 in listDouble)
-          #t192.{core::Set::add}(#t194);
-    #t192.{core::Set::add}(null);
-  } =>#t192;
+        for (final core::num #t204 in listDouble)
+          #t202.{core::Set::add}(#t204);
+    #t202.{core::Set::add}(null);
+  } =>#t202;
   core::List<dynamic> list82 = block {
-    final core::List<dynamic> #t195 = <dynamic>[];
+    final core::List<dynamic> #t205 = <dynamic>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final dynamic #t196 in listInt as{TypeError} core::Iterable<dynamic>)
-          #t195.{core::List::add}(#t196);
+        for (final dynamic #t206 in listInt as{TypeError} core::Iterable<dynamic>)
+          #t205.{core::List::add}(#t206);
       else
-        for (final dynamic #t197 in dynVar as{TypeError} core::Iterable<dynamic>)
-          #t195.{core::List::add}(#t197);
-  } =>#t195;
+        for (final dynamic #t207 in dynVar as{TypeError} core::Iterable<dynamic>)
+          #t205.{core::List::add}(#t207);
+  } =>#t205;
   core::Set<dynamic> set82 = block {
-    final core::Set<dynamic> #t198 = col::LinkedHashSet::•<dynamic>();
+    final core::Set<dynamic> #t208 = col::LinkedHashSet::•<dynamic>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final dynamic #t199 in listInt as{TypeError} core::Iterable<dynamic>)
-          #t198.{core::Set::add}(#t199);
+        for (final dynamic #t209 in listInt as{TypeError} core::Iterable<dynamic>)
+          #t208.{core::Set::add}(#t209);
       else
-        for (final dynamic #t200 in dynVar as{TypeError} core::Iterable<dynamic>)
-          #t198.{core::Set::add}(#t200);
-    #t198.{core::Set::add}(null);
-  } =>#t198;
+        for (final dynamic #t210 in dynVar as{TypeError} core::Iterable<dynamic>)
+          #t208.{core::Set::add}(#t210);
+    #t208.{core::Set::add}(null);
+  } =>#t208;
   core::List<core::num> list83 = block {
-    final core::List<core::num> #t201 = <core::num>[];
+    final core::List<core::num> #t211 = <core::num>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        #t201.{core::List::add}(42);
+        #t211.{core::List::add}(42);
       else
-        for (final core::num #t202 in listDouble)
-          #t201.{core::List::add}(#t202);
-  } =>#t201;
+        for (final core::num #t212 in listDouble)
+          #t211.{core::List::add}(#t212);
+  } =>#t211;
   core::Set<core::num> set83 = block {
-    final core::Set<core::num> #t203 = col::LinkedHashSet::•<core::num>();
+    final core::Set<core::num> #t213 = col::LinkedHashSet::•<core::num>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
       if(self::oracle<dynamic>())
-        for (final core::num #t204 in listInt)
-          #t203.{core::Set::add}(#t204);
+        for (final core::num #t214 in listInt)
+          #t213.{core::Set::add}(#t214);
       else
-        #t203.{core::Set::add}(3.14);
-    #t203.{core::Set::add}(null);
-  } =>#t203;
+        #t213.{core::Set::add}(3.14);
+    #t213.{core::Set::add}(null);
+  } =>#t213;
   core::List<core::int> list90 = block {
-    final core::List<core::int> #t205 = <core::int>[];
+    final core::List<core::int> #t215 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t205.{core::List::add}(dynVar as{TypeError} core::int);
-  } =>#t205;
+      #t215.{core::List::add}(dynVar as{TypeError} core::int);
+  } =>#t215;
   core::Set<core::int> set90 = block {
-    final core::Set<core::int> #t206 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t216 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      #t206.{core::Set::add}(dynVar as{TypeError} core::int);
-    #t206.{core::Set::add}(null);
-  } =>#t206;
+      #t216.{core::Set::add}(dynVar as{TypeError} core::int);
+    #t216.{core::Set::add}(null);
+  } =>#t216;
   core::List<core::int> list91 = block {
-    final core::List<core::int> #t207 = <core::int>[];
+    final core::List<core::int> #t217 = <core::int>[];
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t208 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t207.{core::List::add}(#t208);
-  } =>#t207;
+      for (final core::int #t218 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t217.{core::List::add}(#t218);
+  } =>#t217;
   core::Set<core::int> set91 = block {
-    final core::Set<core::int> #t209 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t219 = col::LinkedHashSet::•<core::int>();
     for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-      for (final core::int #t210 in dynVar as{TypeError} core::Iterable<dynamic>)
-        #t209.{core::Set::add}(#t210);
-    #t209.{core::Set::add}(null);
-  } =>#t209;
+      for (final core::int #t220 in dynVar as{TypeError} core::Iterable<dynamic>)
+        #t219.{core::Set::add}(#t220);
+    #t219.{core::Set::add}(null);
+  } =>#t219;
   core::List<core::int> list100 = block {
-    final core::List<core::int> #t211 = <core::int>[];
-    for (final dynamic #t212 = index = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; index = index.{core::num::+}(1))
-      #t211.{core::List::add}(42);
-  } =>#t211;
+    final core::List<core::int> #t221 = <core::int>[];
+    for (final dynamic #t222 = index = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; index = index.{core::num::+}(1))
+      #t221.{core::List::add}(42);
+  } =>#t221;
   core::Set<core::int> set100 = block {
-    final core::Set<core::int> #t213 = col::LinkedHashSet::•<core::int>();
-    for (final dynamic #t214 = index = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; index = index.{core::num::+}(1))
-      #t213.{core::Set::add}(42);
-  } =>#t213;
+    final core::Set<core::int> #t223 = col::LinkedHashSet::•<core::int>();
+    for (final dynamic #t224 = index = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; index = index.{core::num::+}(1))
+      #t223.{core::Set::add}(42);
+  } =>#t223;
   core::List<core::int> list110 = block {
-    final core::List<core::int> #t215 = <core::int>[];
+    final core::List<core::int> #t225 = <core::int>[];
     for (core::int i in <core::int>[1, 2, 3])
-      #t215.{core::List::add}(i);
-  } =>#t215;
+      #t225.{core::List::add}(i);
+  } =>#t225;
   core::Set<core::int> set110 = block {
-    final core::Set<core::int> #t216 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t226 = col::LinkedHashSet::•<core::int>();
     for (core::int i in <core::int>[1, 2, 3])
-      #t216.{core::Set::add}(i);
-    #t216.{core::Set::add}(null);
-  } =>#t216;
+      #t226.{core::Set::add}(i);
+    #t226.{core::Set::add}(null);
+  } =>#t226;
   core::List<core::int> list120 = block {
-    final core::List<core::int> #t217 = <core::int>[];
+    final core::List<core::int> #t227 = <core::int>[];
     for (dynamic i in dynVar as{TypeError} core::Iterable<dynamic>)
-      #t217.{core::List::add}(i as{TypeError} core::int);
-  } =>#t217;
+      #t227.{core::List::add}(i as{TypeError} core::int);
+  } =>#t227;
   core::Set<core::int> set120 = block {
-    final core::Set<core::int> #t218 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t228 = col::LinkedHashSet::•<core::int>();
     for (dynamic i in dynVar as{TypeError} core::Iterable<dynamic>)
-      #t218.{core::Set::add}(i as{TypeError} core::int);
-    #t218.{core::Set::add}(null);
-  } =>#t218;
+      #t228.{core::Set::add}(i as{TypeError} core::int);
+    #t228.{core::Set::add}(null);
+  } =>#t228;
 }
 static method testForElementErrors(core::Map<core::int, core::int> map) → dynamic /* originally async */ {
   final asy::_AsyncAwaitCompleter<dynamic> :async_completer = new asy::_AsyncAwaitCompleter::•<dynamic>();
@@ -1069,232 +1258,232 @@ static method testForElementErrors(core::Map<core::int, core::int> map) → dyna
     try {
       #L1:
       {
-        <core::int>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:137:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+        <core::int>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:165:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) \"bar\"];
                                             ^"];
-        let final core::Set<core::int> #t219 = col::LinkedHashSet::•<core::int>() in let final core::bool #t220 = #t219.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:138:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+        let final core::Set<core::int> #t229 = col::LinkedHashSet::•<core::int>() in let final core::bool #t230 = #t229.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:166:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) \"bar\", null};
-                                            ^") in let final core::bool #t221 = #t219.{core::Set::add}(null) in #t219;
+                                            ^") in let final core::bool #t231 = #t229.{core::Set::add}(null) in #t229;
         block {
-          final core::List<core::int> #t222 = <core::int>[];
+          final core::List<core::int> #t232 = <core::int>[];
           for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-            for (final core::int #t223 in <core::int>[let final<BottomType> #t224 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:139:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+            for (final core::int #t233 in <core::int>[let final<BottomType> #t234 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:167:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) ...[\"bar\"]];
                                                 ^" in "bar" as{TypeError} core::int])
-              #t222.{core::List::add}(#t223);
-        } =>#t222;
+              #t232.{core::List::add}(#t233);
+        } =>#t232;
         block {
-          final core::Set<core::int> #t225 = col::LinkedHashSet::•<core::int>();
+          final core::Set<core::int> #t235 = col::LinkedHashSet::•<core::int>();
           for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-            for (final core::int #t226 in <core::int>[let final<BottomType> #t227 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:140:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+            for (final core::int #t236 in <core::int>[let final<BottomType> #t237 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:168:49: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) ...[\"bar\"], null};
                                                 ^" in "bar" as{TypeError} core::int])
-              #t225.{core::Set::add}(#t226);
-          #t225.{core::Set::add}(null);
-        } =>#t225;
+              #t235.{core::Set::add}(#t236);
+          #t235.{core::Set::add}(null);
+        } =>#t235;
         block {
-          final core::List<core::int> #t228 = <core::int>[];
+          final core::List<core::int> #t238 = <core::int>[];
           for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-            #t228.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:141:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+            #t238.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:169:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) ...map];
                                                ^");
-        } =>#t228;
+        } =>#t238;
         block {
-          final core::Set<core::int> #t229 = col::LinkedHashSet::•<core::int>();
+          final core::Set<core::int> #t239 = col::LinkedHashSet::•<core::int>();
           for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
-            #t229.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:142:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+            #t239.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:170:48: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) ...map, null};
                                                ^");
-          #t229.{core::Set::add}(null);
-        } =>#t229;
-        <core::String>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:143:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+          #t239.{core::Set::add}(null);
+        } =>#t239;
+        <core::String>[invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:171:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 Try changing the type of the left hand side, or casting the right hand side to 'String'.
   <String>[for (int i = 0; oracle(\"foo\"); i++) if (oracle()) 42 else 3.14];
                                                ^"];
-        let final core::Set<core::String> #t230 = col::LinkedHashSet::•<core::String>() in let final core::bool #t231 = #t230.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:144:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
+        let final core::Set<core::String> #t240 = col::LinkedHashSet::•<core::String>() in let final core::bool #t241 = #t240.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:172:48: Error: A value of type 'num' can't be assigned to a variable of type 'String'.
 Try changing the type of the left hand side, or casting the right hand side to 'String'.
   <String>{for (int i = 0; oracle(\"foo\"); i++) if (oracle()) 42 else 3.14, null};
-                                               ^") in let final core::bool #t232 = #t230.{core::Set::add}(null) in #t230;
+                                               ^") in let final core::bool #t242 = #t240.{core::Set::add}(null) in #t240;
         block {
-          final core::List<core::int> #t233 = <core::int>[];
+          final core::List<core::int> #t243 = <core::int>[];
           for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
             if(self::oracle<dynamic>())
-              #t233.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:145:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+              #t243.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:173:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) if (oracle()) ...map else 42];
                                                              ^");
             else
-              #t233.{core::List::add}(42 as{TypeError} core::int);
-        } =>#t233;
+              #t243.{core::List::add}(42 as{TypeError} core::int);
+        } =>#t243;
         block {
-          final core::Set<core::int> #t234 = col::LinkedHashSet::•<core::int>();
+          final core::Set<core::int> #t244 = col::LinkedHashSet::•<core::int>();
           for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
             if(self::oracle<dynamic>())
-              #t234.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:146:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+              #t244.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:174:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) if (oracle()) ...map else 42, null};
                                                              ^");
             else
-              #t234.{core::Set::add}(42 as{TypeError} core::int);
-          #t234.{core::Set::add}(null);
-        } =>#t234;
+              #t244.{core::Set::add}(42 as{TypeError} core::int);
+          #t244.{core::Set::add}(null);
+        } =>#t244;
         block {
-          final core::List<core::int> #t235 = <core::int>[];
+          final core::List<core::int> #t245 = <core::int>[];
           for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
             if(self::oracle<dynamic>())
-              #t235.{core::List::add}(42 as{TypeError} core::int);
+              #t245.{core::List::add}(42 as{TypeError} core::int);
             else
-              #t235.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:147:70: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+              #t245.{core::List::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:175:70: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>[for (int i = 0; oracle(\"foo\"); i++) if (oracle()) 42 else ...map];
                                                                      ^");
-        } =>#t235;
+        } =>#t245;
         block {
-          final core::Set<core::int> #t236 = col::LinkedHashSet::•<core::int>();
+          final core::Set<core::int> #t246 = col::LinkedHashSet::•<core::int>();
           for (core::int i = 0; self::oracle<core::String>("foo") as{TypeError} core::bool; i = i.{core::num::+}(1))
             if(self::oracle<dynamic>())
-              #t236.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:148:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
+              #t246.{core::Set::add}(invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:176:62: Error: Unexpected type 'Map<int, int>' of a spread.  Expected 'dynamic' or an Iterable.
  - 'Map' is from 'dart:core'.
   <int>{for (int i = 0; oracle(\"foo\"); i++) if (oracle()) ...map else 42, null};
                                                              ^");
             else
-              #t236.{core::Set::add}(42 as{TypeError} core::int);
-          #t236.{core::Set::add}(null);
-        } =>#t236;
+              #t246.{core::Set::add}(42 as{TypeError} core::int);
+          #t246.{core::Set::add}(null);
+        } =>#t246;
         final core::int i = 0;
         block {
-          final core::List<core::int> #t237 = <core::int>[];
-          for (final core::int #t238 in <core::int>[1]) {
-            invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:151:14: Error: Setter not found: 'i'.
+          final core::List<core::int> #t247 = <core::int>[];
+          for (final core::int #t248 in <core::int>[1]) {
+            invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:179:14: Error: Setter not found: 'i'.
   <int>[for (i in <int>[1]) i];
              ^";
-            #t237.{core::List::add}(i);
+            #t247.{core::List::add}(i);
           }
-        } =>#t237;
+        } =>#t247;
         block {
-          final core::Set<core::int> #t239 = col::LinkedHashSet::•<core::int>();
-          for (final core::int #t240 in <core::int>[1]) {
-            invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:152:14: Error: Setter not found: 'i'.
+          final core::Set<core::int> #t249 = col::LinkedHashSet::•<core::int>();
+          for (final core::int #t250 in <core::int>[1]) {
+            invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:180:14: Error: Setter not found: 'i'.
   <int>{for (i in <int>[1]) i, null};
              ^";
-            #t239.{core::Set::add}(i);
+            #t249.{core::Set::add}(i);
           }
-          #t239.{core::Set::add}(null);
-        } =>#t239;
+          #t249.{core::Set::add}(null);
+        } =>#t249;
         core::List<dynamic> list10 = block {
-          final core::List<dynamic> #t241 = <dynamic>[];
-          for (dynamic i in let final<BottomType> #t242 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:154:31: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+          final core::List<dynamic> #t251 = <dynamic>[];
+          for (dynamic i in let final<BottomType> #t252 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:182:31: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
  - 'Iterable' is from 'dart:core'.
   var list10 = [for (var i in \"not iterable\") i];
                               ^" in "not iterable" as{TypeError} core::Iterable<dynamic>)
-            #t241.{core::List::add}(i);
-        } =>#t241;
+            #t251.{core::List::add}(i);
+        } =>#t251;
         core::Set<dynamic> set10 = block {
-          final core::Set<dynamic> #t243 = col::LinkedHashSet::•<dynamic>();
-          for (dynamic i in let final<BottomType> #t244 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:155:30: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+          final core::Set<dynamic> #t253 = col::LinkedHashSet::•<dynamic>();
+          for (dynamic i in let final<BottomType> #t254 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:183:30: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
  - 'Iterable' is from 'dart:core'.
   var set10 = {for (var i in \"not iterable\") i, null};
                              ^" in "not iterable" as{TypeError} core::Iterable<dynamic>)
-            #t243.{core::Set::add}(i);
-          #t243.{core::Set::add}(null);
-        } =>#t243;
+            #t253.{core::Set::add}(i);
+          #t253.{core::Set::add}(null);
+        } =>#t253;
         core::List<core::int> list20 = block {
-          final core::List<core::int> #t245 = <core::int>[];
-          for (core::int i in <core::int>[let final<BottomType> #t246 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:156:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+          final core::List<core::int> #t255 = <core::int>[];
+          for (core::int i in <core::int>[let final<BottomType> #t256 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:184:32: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var list20 = [for (int i in [\"not\", \"int\"]) i];
-                               ^" in "not" as{TypeError} core::int, let final<BottomType> #t247 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:156:39: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+                               ^" in "not" as{TypeError} core::int, let final<BottomType> #t257 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:184:39: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var list20 = [for (int i in [\"not\", \"int\"]) i];
                                       ^" in "int" as{TypeError} core::int])
-            #t245.{core::List::add}(i);
-        } =>#t245;
+            #t255.{core::List::add}(i);
+        } =>#t255;
         core::Set<core::int> set20 = block {
-          final core::Set<core::int> #t248 = col::LinkedHashSet::•<core::int>();
-          for (core::int i in <core::int>[let final<BottomType> #t249 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:157:31: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+          final core::Set<core::int> #t258 = col::LinkedHashSet::•<core::int>();
+          for (core::int i in <core::int>[let final<BottomType> #t259 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:185:31: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var set20 = {for (int i in [\"not\", \"int\"]) i, null};
-                              ^" in "not" as{TypeError} core::int, let final<BottomType> #t250 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:157:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+                              ^" in "not" as{TypeError} core::int, let final<BottomType> #t260 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:185:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var set20 = {for (int i in [\"not\", \"int\"]) i, null};
                                      ^" in "int" as{TypeError} core::int])
-            #t248.{core::Set::add}(i);
-          #t248.{core::Set::add}(null);
-        } =>#t248;
+            #t258.{core::Set::add}(i);
+          #t258.{core::Set::add}(null);
+        } =>#t258;
         core::List<dynamic> list30 = block {
-          final core::List<dynamic> #t251 = <dynamic>[];
-          await for (dynamic i in let final<BottomType> #t252 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:158:37: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+          final core::List<dynamic> #t261 = <dynamic>[];
+          await for (dynamic i in let final<BottomType> #t262 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:186:37: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
  - 'Stream' is from 'dart:async'.
   var list30 = [await for (var i in \"not stream\") i];
                                     ^" in "not stream" as{TypeError} asy::Stream<dynamic>)
-            #t251.{core::List::add}(i);
-        } =>#t251;
+            #t261.{core::List::add}(i);
+        } =>#t261;
         core::Set<dynamic> set30 = block {
-          final core::Set<dynamic> #t253 = col::LinkedHashSet::•<dynamic>();
-          await for (dynamic i in let final<BottomType> #t254 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:159:36: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+          final core::Set<dynamic> #t263 = col::LinkedHashSet::•<dynamic>();
+          await for (dynamic i in let final<BottomType> #t264 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:187:36: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
  - 'Stream' is from 'dart:async'.
   var set30 = {await for (var i in \"not stream\") i, null};
                                    ^" in "not stream" as{TypeError} asy::Stream<dynamic>)
-            #t253.{core::Set::add}(i);
-          #t253.{core::Set::add}(null);
-        } =>#t253;
+            #t263.{core::Set::add}(i);
+          #t263.{core::Set::add}(null);
+        } =>#t263;
         core::List<core::int> list40 = block {
-          final core::List<core::int> #t255 = <core::int>[];
-          await for (core::int i in asy::Stream::fromIterable<core::int>(<core::int>[let final<BottomType> #t256 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:160:58: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+          final core::List<core::int> #t265 = <core::int>[];
+          await for (core::int i in asy::Stream::fromIterable<core::int>(<core::int>[let final<BottomType> #t266 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:188:58: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var list40 = [await for (int i in Stream.fromIterable([\"not\", \"int\"])) i];
-                                                         ^" in "not" as{TypeError} core::int, let final<BottomType> #t257 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:160:65: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+                                                         ^" in "not" as{TypeError} core::int, let final<BottomType> #t267 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:188:65: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var list40 = [await for (int i in Stream.fromIterable([\"not\", \"int\"])) i];
                                                                 ^" in "int" as{TypeError} core::int]))
-            #t255.{core::List::add}(i);
-        } =>#t255;
+            #t265.{core::List::add}(i);
+        } =>#t265;
         core::Set<core::int> set40 = block {
-          final core::Set<core::int> #t258 = col::LinkedHashSet::•<core::int>();
-          await for (core::int i in asy::Stream::fromIterable<core::int>(<core::int>[let final<BottomType> #t259 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:161:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+          final core::Set<core::int> #t268 = col::LinkedHashSet::•<core::int>();
+          await for (core::int i in asy::Stream::fromIterable<core::int>(<core::int>[let final<BottomType> #t269 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:189:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var set40 = {await for (int i in Stream.fromIterable([\"not\", \"int\"])) i, null};
-                                                        ^" in "not" as{TypeError} core::int, let final<BottomType> #t260 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:161:64: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+                                                        ^" in "not" as{TypeError} core::int, let final<BottomType> #t270 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:189:64: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 Try changing the type of the left hand side, or casting the right hand side to 'int'.
   var set40 = {await for (int i in Stream.fromIterable([\"not\", \"int\"])) i, null};
                                                                ^" in "int" as{TypeError} core::int]))
-            #t258.{core::Set::add}(i);
-          #t258.{core::Set::add}(null);
-        } =>#t258;
+            #t268.{core::Set::add}(i);
+          #t268.{core::Set::add}(null);
+        } =>#t268;
         core::List<core::int> list50 = block {
-          final core::List<core::int> #t261 = <core::int>[];
+          final core::List<core::int> #t271 = <core::int>[];
           for (; ; )
-            #t261.{core::List::add}(42);
-        } =>#t261;
+            #t271.{core::List::add}(42);
+        } =>#t271;
         core::Set<core::int> set50 = block {
-          final core::Set<core::int> #t262 = col::LinkedHashSet::•<core::int>();
+          final core::Set<core::int> #t272 = col::LinkedHashSet::•<core::int>();
           for (; ; )
-            #t262.{core::Set::add}(42);
-          #t262.{core::Set::add}(null);
-        } =>#t262;
+            #t272.{core::Set::add}(42);
+          #t272.{core::Set::add}(null);
+        } =>#t272;
         core::List<core::int> list60 = block {
-          final core::List<core::int> #t263 = <core::int>[];
-          for (; let final<BottomType> #t264 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:164:24: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
+          final core::List<core::int> #t273 = <core::int>[];
+          for (; let final<BottomType> #t274 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:192:24: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
 Try changing the type of the left hand side, or casting the right hand side to 'bool'.
   var list60 = [for (; \"not bool\";) 42];
                        ^" in "not bool" as{TypeError} core::bool; )
-            #t263.{core::List::add}(42);
-        } =>#t263;
+            #t273.{core::List::add}(42);
+        } =>#t273;
         core::Set<core::int> set60 = block {
-          final core::Set<core::int> #t265 = col::LinkedHashSet::•<core::int>();
-          for (; let final<BottomType> #t266 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:165:23: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
+          final core::Set<core::int> #t275 = col::LinkedHashSet::•<core::int>();
+          for (; let final<BottomType> #t276 = invalid-expression "pkg/front_end/testcases/control_flow_collection_inference.dart:193:23: Error: A value of type 'String' can't be assigned to a variable of type 'bool'.
 Try changing the type of the left hand side, or casting the right hand side to 'bool'.
   var set60 = {for (; \"not bool\";) 42, null};
                       ^" in "not bool" as{TypeError} core::bool; )
-            #t265.{core::Set::add}(42);
-          #t265.{core::Set::add}(null);
-        } =>#t265;
+            #t275.{core::Set::add}(42);
+          #t275.{core::Set::add}(null);
+        } =>#t275;
       }
       asy::_completeOnAsyncReturn(:async_completer, :return_value);
       return;
@@ -1310,14 +1499,14 @@ Try changing the type of the left hand side, or casting the right hand side to '
 }
 static method testForElementErrorsNotAsync(asy::Stream<core::int> stream) → dynamic {
   block {
-    final core::List<core::int> #t267 = <core::int>[];
+    final core::List<core::int> #t277 = <core::int>[];
     await for (core::int i in stream)
-      #t267.{core::List::add}(i);
-  } =>#t267;
+      #t277.{core::List::add}(i);
+  } =>#t277;
   block {
-    final core::Set<core::int> #t268 = col::LinkedHashSet::•<core::int>();
+    final core::Set<core::int> #t278 = col::LinkedHashSet::•<core::int>();
     await for (core::int i in stream)
-      #t268.{core::Set::add}(i);
-  } =>#t268;
+      #t278.{core::Set::add}(i);
+  } =>#t278;
 }
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/control_flow_collection_inference.dart.type_promotion.expect b/pkg/front_end/testcases/control_flow_collection_inference.dart.type_promotion.expect
index 995da92310e4..439b13cf15cf 100644
--- a/pkg/front_end/testcases/control_flow_collection_inference.dart.type_promotion.expect
+++ b/pkg/front_end/testcases/control_flow_collection_inference.dart.type_promotion.expect
@@ -1,198 +1,198 @@
-pkg/front_end/testcases/control_flow_collection_inference.dart:78:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:106:49: Context: Write to i@6001
   var list10 = [for (int i = 0; oracle("foo"); i++) 42];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:79:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:107:48: Context: Write to i@6001
   var set10 = {for (int i = 0; oracle("foo"); i++) 42, null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:80:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:108:49: Context: Write to i@6001
   var list11 = [for (int i = 0; oracle("foo"); i++) dynVar];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:81:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:109:48: Context: Write to i@6001
   var set11 = {for (int i = 0; oracle("foo"); i++) dynVar, null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:82:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:110:49: Context: Write to i@6001
   var list12 = [for (int i = 0; oracle("foo"); i++) [42]];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:83:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:111:48: Context: Write to i@6001
   var set12 = {for (int i = 0; oracle("foo"); i++) [42], null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:84:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:112:49: Context: Write to i@6001
   var list20 = [for (int i = 0; oracle("foo"); i++) ...[42]];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:85:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:113:48: Context: Write to i@6001
   var set20 = {for (int i = 0; oracle("foo"); i++) ...[42], null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:86:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:114:49: Context: Write to i@6001
   var list21 = [for (int i = 0; oracle("foo"); i++) ...[dynVar]];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:87:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:115:48: Context: Write to i@6001
   var set21 = {for (int i = 0; oracle("foo"); i++) ...[dynVar], null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:88:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:116:49: Context: Write to i@6001
   var list22 = [for (int i = 0; oracle("foo"); i++) ...[[42]]];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:89:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:117:48: Context: Write to i@6001
   var set22 = {for (int i = 0; oracle("foo"); i++) ...[[42]], null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:90:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:118:49: Context: Write to i@6001
   var list30 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42]];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:91:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:119:48: Context: Write to i@6001
   var set30 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[42], null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:92:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:120:49: Context: Write to i@6001
   var list31 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar]];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:93:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:121:48: Context: Write to i@6001
   var set31 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[dynVar], null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:94:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:122:49: Context: Write to i@6001
   var list33 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]]];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:95:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:123:48: Context: Write to i@6001
   var set33 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[42]], null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:96:61: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:124:61: Context: Write to i@6001
   List<List<int>> list40 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
                                                             ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:97:59: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:125:59: Context: Write to i@6001
   Set<List<int>> set40 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
                                                           ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:98:61: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:126:61: Context: Write to i@6001
   List<List<int>> list41 = [for (int i = 0; oracle("foo"); i++) ...{[]}];
                                                             ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:99:59: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:127:59: Context: Write to i@6001
   Set<List<int>> set41 = {for (int i = 0; oracle("foo"); i++) ...{[]}, null};
                                                           ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:100:61: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:128:61: Context: Write to i@6001
   List<List<int>> list42 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
                                                             ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:101:59: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:129:59: Context: Write to i@6001
   Set<List<int>> set42 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
                                                           ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:102:55: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:130:55: Context: Write to i@6001
   List<int> list50 = [for (int i = 0; oracle("foo"); i++) ...[]];
                                                       ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:103:53: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:131:53: Context: Write to i@6001
   Set<int> set50 = {for (int i = 0; oracle("foo"); i++) ...[], null};
                                                     ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:104:55: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:132:55: Context: Write to i@6001
   List<int> list51 = [for (int i = 0; oracle("foo"); i++) ...{}];
                                                       ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:105:53: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:133:53: Context: Write to i@6001
   Set<int> set51 = {for (int i = 0; oracle("foo"); i++) ...{}, null};
                                                     ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:106:55: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:134:55: Context: Write to i@6001
   List<int> list52 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[]];
                                                       ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:107:53: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:135:53: Context: Write to i@6001
   Set<int> set52 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[], null};
                                                     ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:108:61: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:136:61: Context: Write to i@6001
   List<List<int>> list60 = [for (int i = 0; oracle("foo"); i++) ...[[]]];
                                                             ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:109:59: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:137:59: Context: Write to i@6001
   Set<List<int>> set60 = {for (int i = 0; oracle("foo"); i++) ...[[]], null};
                                                           ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:110:61: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:138:61: Context: Write to i@6001
   List<List<int>> list61 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]]];
                                                             ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:111:59: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:139:59: Context: Write to i@6001
   Set<List<int>> set61 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...[[]], null};
                                                           ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:112:61: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:140:61: Context: Write to i@6001
   List<List<int>> list70 = [for (int i = 0; oracle("foo"); i++) []];
                                                             ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:113:59: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:141:59: Context: Write to i@6001
   Set<List<int>> set70 = {for (int i = 0; oracle("foo"); i++) [], null};
                                                           ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:114:61: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:142:61: Context: Write to i@6001
   List<List<int>> list71 = [for (int i = 0; oracle("foo"); i++) if (oracle()) []];
                                                             ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:115:59: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:143:59: Context: Write to i@6001
   Set<List<int>> set71 = {for (int i = 0; oracle("foo"); i++) if (oracle()) [], null};
                                                           ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:116:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:144:49: Context: Write to i@6001
   var list80 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:117:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:145:48: Context: Write to i@6001
   var set80 = {for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:118:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:146:49: Context: Write to i@6001
   var list81 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:119:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:147:48: Context: Write to i@6001
   var set81 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...listDouble, null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:120:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:148:49: Context: Write to i@6001
   var list82 = [for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:121:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:149:48: Context: Write to i@6001
   var set82 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else ...dynVar, null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:122:49: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:150:49: Context: Write to i@6001
   var list83 = [for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...listDouble];
                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:123:48: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:151:48: Context: Write to i@6001
   var set83 = {for (int i = 0; oracle("foo"); i++) if (oracle()) ...listInt else 3.14, null};
                                                ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:124:55: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:152:55: Context: Write to i@6001
   List<int> list90 = [for (int i = 0; oracle("foo"); i++) dynVar];
                                                       ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:125:53: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:153:53: Context: Write to i@6001
   Set<int> set90 = {for (int i = 0; oracle("foo"); i++) dynVar, null};
                                                     ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:126:55: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:154:55: Context: Write to i@6001
   List<int> list91 = [for (int i = 0; oracle("foo"); i++) ...dynVar];
                                                       ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:127:53: Context: Write to i@3961
+pkg/front_end/testcases/control_flow_collection_inference.dart:155:53: Context: Write to i@6001
   Set<int> set91 = {for (int i = 0; oracle("foo"); i++) ...dynVar, null};
                                                     ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:128:40: Context: Write to index@3927
+pkg/front_end/testcases/control_flow_collection_inference.dart:156:40: Context: Write to index@5967
   List<int> list100 = <int>[for (index = 0; oracle("foo"); index++) 42];
                                        ^
-pkg/front_end/testcases/control_flow_collection_inference.dart:128:65: Context: Write to index@3927
+pkg/front_end/testcases/control_flow_collection_inference.dart:156:65: Context: Write to index@5967
   List<int> list100 = <int>[for (index = 0; oracle("foo"); index++) 42];
                                                                 ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:129:38: Context: Write to index@3927
+pkg/front_end/testcases/control_flow_collection_inference.dart:157:38: Context: Write to index@5967
   Set<int> set100 = <int>{for (index = 0; oracle("foo"); index++) 42};
                                      ^
-pkg/front_end/testcases/control_flow_collection_inference.dart:129:63: Context: Write to index@3927
+pkg/front_end/testcases/control_flow_collection_inference.dart:157:63: Context: Write to index@5967
   Set<int> set100 = <int>{for (index = 0; oracle("foo"); index++) 42};
                                                               ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:137:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:165:41: Context: Write to i@10229
   <int>[for (int i = 0; oracle("foo"); i++) "bar"];
                                         ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:138:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:166:41: Context: Write to i@10229
   <int>{for (int i = 0; oracle("foo"); i++) "bar", null};
                                         ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:139:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:167:41: Context: Write to i@10229
   <int>[for (int i = 0; oracle("foo"); i++) ...["bar"]];
                                         ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:140:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:168:41: Context: Write to i@10229
   <int>{for (int i = 0; oracle("foo"); i++) ...["bar"], null};
                                         ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:141:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:169:41: Context: Write to i@10229
   <int>[for (int i = 0; oracle("foo"); i++) ...map];
                                         ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:142:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:170:41: Context: Write to i@10229
   <int>{for (int i = 0; oracle("foo"); i++) ...map, null};
                                         ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:143:44: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:171:44: Context: Write to i@10229
   <String>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14];
                                            ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:144:44: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:172:44: Context: Write to i@10229
   <String>{for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else 3.14, null};
                                            ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:145:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:173:41: Context: Write to i@10229
   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42];
                                         ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:146:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:174:41: Context: Write to i@10229
   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
                                         ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:147:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:175:41: Context: Write to i@10229
   <int>[for (int i = 0; oracle("foo"); i++) if (oracle()) 42 else ...map];
                                         ^^
-pkg/front_end/testcases/control_flow_collection_inference.dart:148:41: Context: Write to i@8189
+pkg/front_end/testcases/control_flow_collection_inference.dart:176:41: Context: Write to i@10229
   <int>{for (int i = 0; oracle("foo"); i++) if (oracle()) ...map else 42, null};
                                         ^^
diff --git a/tests/co19_2/co19_2-kernel.status b/tests/co19_2/co19_2-kernel.status
index 0cb96d95b2c6..b03b6729dabb 100644
--- a/tests/co19_2/co19_2-kernel.status
+++ b/tests/co19_2/co19_2-kernel.status
@@ -141,44 +141,18 @@ LanguageFeatures/Control-flow-collections/const_collections_A07_t01: CompileTime
 LanguageFeatures/Control-flow-collections/const_collections_A07_t02: CompileTimeError
 LanguageFeatures/Control-flow-collections/dynamic_semantics_map_A03_t01: CompileTimeError
 LanguageFeatures/Control-flow-collections/dynamic_semantics_set_A03_t01: CompileTimeError
-LanguageFeatures/Control-flow-collections/static_errors_A02_t01/01: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_errors_A02_t01/02: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_errors_A02_t01/03: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_errors_A02_t01/04: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_errors_A02_t01/05: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_errors_A03_t01/01: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_errors_A03_t01/02: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_errors_A03_t01/03: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_errors_A03_t01/04: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_errors_A03_t01/05: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_errors_A04_t01/01: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_errors_A04_t01/02: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_errors_A04_t01/03: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_errors_A04_t01/04: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/01: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/02: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/03: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/04: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/05: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/06: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/07: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/08: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/09: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/10: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/11: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/12: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/13: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/14: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/15: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/16: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/17: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/18: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/19: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/20: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/21: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/22: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/23: MissingCompileTimeError
-LanguageFeatures/Control-flow-collections/static_semantics_A02_t02/24: MissingCompileTimeError
 LanguageFeatures/Control-flow-collections/syntax_A02_t01: CompileTimeError
 LanguageFeatures/Control-flow-collections/type_inference_A05_t01: CompileTimeError
 LanguageFeatures/Control-flow-collections/type_inference_A06_t01: CompileTimeError
diff --git a/tests/language_2/language_2_kernel.status b/tests/language_2/language_2_kernel.status
index d3dbc7139830..b142eaa6659c 100644
--- a/tests/language_2/language_2_kernel.status
+++ b/tests/language_2/language_2_kernel.status
@@ -238,8 +238,6 @@ control_flow_collections/syntax_test: CompileTimeError
 control_flow_collections/type_error_test/00: MissingCompileTimeError
 control_flow_collections/type_error_test/01: MissingCompileTimeError
 control_flow_collections/type_error_test/02: MissingCompileTimeError
-control_flow_collections/type_error_test/07: MissingCompileTimeError
-control_flow_collections/type_error_test/08: MissingCompileTimeError
 control_flow_collections/type_error_test/10: MissingCompileTimeError
 control_flow_collections/type_error_test/11: MissingCompileTimeError
 control_flow_collections/type_error_test/12: MissingCompileTimeError