diff --git a/pkg/analysis_server/doc/process/new_language_feature.md b/pkg/analysis_server/doc/process/new_language_feature.md
index ef8c83ddfcfa..44f531933528 100644
--- a/pkg/analysis_server/doc/process/new_language_feature.md
+++ b/pkg/analysis_server/doc/process/new_language_feature.md
@@ -18,41 +18,68 @@ Separate issues should be created for each of the items in the list.
 The following is a list of the individual features that need to be considered.
 The features are listed in alphabetical order.
 
-- [ ] Call Hierarchy
-- [ ] Closing Labels
+- [ ] Call Hierarchy (an IDE feature where you can get a call hierarchy if you
+      click on a method)
+- [ ] Closing Labels (an LSP feature allowing the IDE to show lightly grayed out
+      comments at the end of the last line of a multi-line invocation, to aid
+      the user in understanding what invocation is closed by a `)`)
 - [ ] Code Completion
 - [ ] Code Folding
-- [ ] Document Symbols
-- [ ] Document Colors
-- [ ] Flutter Outline
+- [ ] Document Colors (an LSP feature whereby a reference to a color in code can
+      be associated with a colored swatch and a color picker)
 - [ ] Hovers
-- [ ] Implemented Markers
-- [ ] Inlay Hints
-- [ ] Navigation - legacy
-- [ ] Navigation - LSP Go to Definition
-- [ ] Navigation - LSP Go to Type Definition
-- [ ] Navigation - Go to Super
-- [ ] Occurrences - legacy
-- [ ] Occurrences - LSP Document Highlights
+- Implemented/override markers (a legacy protocol feature, only available to
+  IntelliJ and Android Studio)
+  - [ ] Implemented Markers (allows navigation from a base class method to
+        methods that override it, or from a base class to classes that
+        extend/implement it)
+  - [ ] Override Markers (allows navigation from a method to the base class
+        method it overrides, or from a class to the class that it
+        extends/implements)
+- [ ] Inlay Hints (an LSP feature allowing extra information to be displayed
+      using inline hints)
+- Navigation
+  - [ ] Go to Definition (LSP feature)
+  - [ ] Go to Type Definition (LSP feature)
+  - [ ] Go to Super (LSP feature)
+  - [ ] Legacy protocol (for IntelliJ and Android Studio)
+- Occurrences
+  - [ ] Legacy protocol (for IntelliJ and Android Studio)
+  - [ ] Document Highlights (LSP feature)
 - [ ] Organize Imports
-- [ ] Outline
-- [ ] Overrides Markers
-- [ ] Quick Assists
-- [ ] Quick Fixes
-- [ ] Refactorings - legacy
-- [ ] Refactorings - self describing
-- [ ] Search - Find References
-- [ ] Search - Implementations - LSP
-- [ ] Search - Member Declarations
-- [ ] Search - Member References
-- [ ] Search - Top-level Declarations
-- [ ] Selection Range
+- Outline
+  - [ ] Flutter Outline
+  - [ ] Legacy protocol, a.k.a. Document Symbols (for IntelliJ and Android
+        Studio)
+  - [ ] LSP feature
+- Refactorings and quick assists/fixes (note that in addition to potentially
+  creating new refactorings and/or quick assists/fixes, part of the work
+  required to implement a new language feature includes evaluating each existing
+  refactoring and quick fix/assist to see whether it needs to be improved or
+  have test cases added to reflect the new feature).
+  - [ ] Legacy refactorings (for IntelliJ and Android Studio)
+  - [ ] LSP rename refactoring (note that LSP has a special protocol for
+        renames)
+  - [ ] LSP self-describing refactorings
+  - [ ] Quick Assists
+  - [ ] Quick Fixes
+- Search
+  - [ ] Find References
+  - [ ] Implementations - LSP
+  - [ ] Member Declarations
+  - [ ] Member References
+  - [ ] Top-level Declarations
+- [ ] Selection Range (an LSP feature allowing a selection to be expanded to
+      cover the range of an ancestor AST node)
 - Syntax Highlighting
-  - [ ] Semantic Highlights
-  - [ ] LSP Semantic Tokens
-- [ ] Signature Help
+  - [ ] Legacy protocol, a.k.a. Semantic Highlights (for IntelliJ and Android
+        Studio)
+  - [ ] Semantic Tokens (LSP feature)
+- [ ] Signature Help (an LSP feature that tells the parameters and types needed
+      for an invocation)
 - [ ] Snippets
 - [ ] Sort Members
-- [ ] Type Hierarchy - legacy
-- [ ] Type Hierarchy - LSP
-- [ ] Workspace Symbols
+- Type Hierarchy
+  - [ ] Legacy protocol (for IntelliJ and Android Studio)
+  - [ ] LSP feature
+- [ ] Workspace Symbols (LSP feature)
diff --git a/pkg/analysis_server/lib/src/services/correction/error_fix_status.yaml b/pkg/analysis_server/lib/src/services/correction/error_fix_status.yaml
index ffe813f70222..31e6ffa1abff 100644
--- a/pkg/analysis_server/lib/src/services/correction/error_fix_status.yaml
+++ b/pkg/analysis_server/lib/src/services/correction/error_fix_status.yaml
@@ -45,8 +45,8 @@
 #
 # Stats:
 # -  42 "needsEvaluation"
-# - 346 "needsFix"
-# - 405 "hasFix"
+# - 345 "needsFix"
+# - 406 "hasFix"
 # - 516 "noFix"
 
 AnalysisOptionsErrorCode.INCLUDED_FILE_PARSE_ERROR:
@@ -2590,9 +2590,7 @@ ParserErrorCode.CONST_CONSTRUCTOR_WITH_BODY:
 ParserErrorCode.CONST_FACTORY:
   status: hasFix
 ParserErrorCode.CONST_METHOD:
-  status: needsFix
-  notes: |-
-    Remove the `const` keyword.
+  status: hasFix
 ParserErrorCode.CONSTRUCTOR_WITH_RETURN_TYPE:
   status: needsFix
   notes: |-
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index 67975fa983fb..632db5a11a95 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -1360,6 +1360,9 @@ final _builtInNonLintProducers = <ErrorCode, List<ProducerGenerator>>{
   ParserErrorCode.CONST_FACTORY: [
     RemoveConst.new,
   ],
+  ParserErrorCode.CONST_METHOD: [
+    RemoveConst.new,
+  ],
   ParserErrorCode.DEFAULT_IN_SWITCH_EXPRESSION: [
     ReplaceWithWildcard.new,
   ],
diff --git a/pkg/analysis_server/test/src/services/correction/fix/remove_extra_modifier_test.dart b/pkg/analysis_server/test/src/services/correction/fix/remove_extra_modifier_test.dart
index f412204ef71e..b3127b5cc79b 100644
--- a/pkg/analysis_server/test/src/services/correction/fix/remove_extra_modifier_test.dart
+++ b/pkg/analysis_server/test/src/services/correction/fix/remove_extra_modifier_test.dart
@@ -140,6 +140,15 @@ mixin class A {}
 ''');
   }
 
+  Future<void> test_constMethod() async {
+    await resolveTestCode('''
+const void m() {}
+''');
+    await assertHasFix('''
+void m() {}
+''');
+  }
+
   Future<void> test_covariantTopLevelDeclaration_class() async {
     await resolveTestCode(r'''
 covariant class C {}
diff --git a/pkg/analyzer/tool/messages/generate.dart b/pkg/analyzer/tool/messages/generate.dart
index 484650bcc843..ddf6063ef615 100644
--- a/pkg/analyzer/tool/messages/generate.dart
+++ b/pkg/analyzer/tool/messages/generate.dart
@@ -313,8 +313,8 @@ class _SyntacticErrorGenerator {
     }
 
     // Print the # of autogenerated ParserErrorCodes.
-    print('${cfeToAnalyzerErrorCodeTables.infoToAnalyzerCode.length} of '
-        '${messageToName.length} ParserErrorCodes generated.');
+    print('${messageToName.length} of '
+        '${cfeToAnalyzerErrorCodeTables.infoToAnalyzerCode.length} ParserErrorCodes generated.');
 
     // List the ParserErrorCodes that could easily be auto generated
     // but have not been already.
diff --git a/pkg/front_end/test/coverage_suite.dart b/pkg/front_end/test/coverage_suite.dart
index f36da0cdcc20..db241fa8fb0f 100644
--- a/pkg/front_end/test/coverage_suite.dart
+++ b/pkg/front_end/test/coverage_suite.dart
@@ -381,9 +381,12 @@ Future<void> _run(Directory coverageTmpDir, List<String> arguments) async {
       }));
     }
 
-    if (options.verbose) {
+    if (options.verbose || log != null) {
       String result = pass ? "PASS" : "FAIL";
       print("${testName}: ${result}");
+      if (log != null) {
+        print("  ${log.replaceAll('\n', '\n  ')}");
+      }
     }
   }
 
@@ -393,6 +396,7 @@ Future<void> _run(Directory coverageTmpDir, List<String> arguments) async {
       // TODO(jensj): More info here would be good.
       addResult(coverageEntry.key.toString(), false, log: "Error");
     } else {
+      StringBuffer sb = new StringBuffer();
       int hitCount = coverageEntry.value.hitCount;
       int missCount = coverageEntry.value.missCount;
       double percent = (hitCount / (hitCount + missCount) * 100);
@@ -402,13 +406,24 @@ Future<void> _run(Directory coverageTmpDir, List<String> arguments) async {
       int requireAtLeast =
           (_expect[coverageEntry.key.toString()] ?? 0.0).floor();
       bool pass = percent >= requireAtLeast;
-      String? log;
       if (!pass) {
-        log = "${coverageEntry.value.visualization}\n\n"
-            "Expected at least $requireAtLeast%, got $percent% "
-            "($hitCount hits and $missCount misses).";
+        sb.write("${coverageEntry.value.visualization}");
+        sb.write("\n\nExpected at least $requireAtLeast%, got $percent% "
+            "($hitCount hits and $missCount misses).");
+        sb.write("\n\nTo re-run this test, run:");
+        var extraFlags = _assertsEnabled ? ' --enable-asserts' : '';
+        // It looks like coverage results vary slightly based on the number of
+        // tasks, so include a `--tasks=` argument in the repro instructions.
+        //
+        // TODO(paulberry): why do coverage results vary based on the number of
+        // tasks? (Note: possibly due to
+        // https://github.com/dart-lang/sdk/issues/42061)
+        sb.write(
+            "\n\n   dart$extraFlags pkg/front_end/test/coverage_suite.dart "
+            "--tasks=${options.numberOfWorkers}");
       }
-      addResult(coverageEntry.key.toString(), pass, log: log);
+      addResult(coverageEntry.key.toString(), pass,
+          log: sb.isEmpty ? null : sb.toString());
     }
   }
 
@@ -507,3 +522,9 @@ class Options {
     );
   }
 }
+
+final bool _assertsEnabled = () {
+  bool assertsEnabled = false;
+  assert(assertsEnabled = true);
+  return assertsEnabled;
+}();
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index f36c5f109d5f..56fdb18e38c6 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -6070,8 +6070,6 @@ class PcDescriptors : public Object {
   // Verify (assert) assumptions about pc descriptors in debug mode.
   void Verify(const Function& function) const;
 
-  static void PrintHeaderString();
-
   void PrintToJSONObject(JSONObject* jsobj, bool ref) const;
 
   // We would have a VisitPointers function here to traverse the
@@ -10842,22 +10840,27 @@ class Array : public Instance {
 
   template <std::memory_order order = std::memory_order_relaxed>
   ObjectPtr At(intptr_t index) const {
+    ASSERT((0 <= index) && (index < Length()));
     return untag()->element<order>(index);
   }
   template <std::memory_order order = std::memory_order_relaxed>
   void SetAt(intptr_t index, const Object& value) const {
+    ASSERT((0 <= index) && (index < Length()));
     untag()->set_element<order>(index, value.ptr());
   }
   template <std::memory_order order = std::memory_order_relaxed>
   void SetAt(intptr_t index, const Object& value, Thread* thread) const {
+    ASSERT((0 <= index) && (index < Length()));
     untag()->set_element<order>(index, value.ptr(), thread);
   }
 
   // Access to the array with acquire release semantics.
   ObjectPtr AtAcquire(intptr_t index) const {
+    ASSERT((0 <= index) && (index < Length()));
     return untag()->element<std::memory_order_acquire>(index);
   }
   void SetAtRelease(intptr_t index, const Object& value) const {
+    ASSERT((0 <= index) && (index < Length()));
     untag()->set_element<std::memory_order_release>(index, value.ptr());
   }
 
diff --git a/third_party/pkg/dap/CHANGELOG.md b/third_party/pkg/dap/CHANGELOG.md
index 42c1adcaee20..dd201e532818 100644
--- a/third_party/pkg/dap/CHANGELOG.md
+++ b/third_party/pkg/dap/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.3.0
+
+- Add `showToUser` field to `DebugAdapterException` to specify which errors should be shown to users.
+
 ## 1.2.0
 
 - Added `DartInitializeRequestArguments`, a subclass of `InitializeRequestArguments` that supports a custom flag `supportsDartUris` for informing the debug adapter that the client supports using URIs in places that might usually be file paths (such as `stackTraceRequest`). Setting this flag indicates that the client supports `file:` URIs _and also_ any custom-scheme URIs whose content can be provided by the analysis server from the matching Dart SDK.
diff --git a/third_party/pkg/dap/lib/src/exceptions.dart b/third_party/pkg/dap/lib/src/exceptions.dart
index 5e039c740797..becb265f649a 100644
--- a/third_party/pkg/dap/lib/src/exceptions.dart
+++ b/third_party/pkg/dap/lib/src/exceptions.dart
@@ -8,7 +8,10 @@
 class DebugAdapterException implements Exception {
   final String message;
 
-  DebugAdapterException(this.message);
+  /// Whether or not to show the error to the user as a notification.
+  final bool showToUser;
+
+  DebugAdapterException(this.message, {this.showToUser = false});
 
   @override
   String toString() => 'DebugAdapterException: $message';
@@ -37,12 +40,16 @@ class DebugAdapterInvalidArgumentException implements DebugAdapterException {
   final Type actualType;
   final Object? actualValue;
 
+  @override
+  final bool showToUser;
+
   DebugAdapterInvalidArgumentException({
     required this.requestName,
     required this.argumentName,
     required this.expectedType,
     required this.actualType,
     required this.actualValue,
+    this.showToUser = false,
   });
 
   @override
diff --git a/third_party/pkg/dap/pubspec.yaml b/third_party/pkg/dap/pubspec.yaml
index 5e200c5a638e..53c3fbea9443 100644
--- a/third_party/pkg/dap/pubspec.yaml
+++ b/third_party/pkg/dap/pubspec.yaml
@@ -1,5 +1,5 @@
 name: dap
-version: 1.2.0
+version: 1.3.0
 description: >-
   A package of classes that are generated from the DAP specifications along with
   their generating code.
diff --git a/tools/VERSION b/tools/VERSION
index 8be83bb84b3a..6b0bbec06df6 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@ CHANNEL dev
 MAJOR 3
 MINOR 5
 PATCH 0
-PRERELEASE 223
+PRERELEASE 224
 PRERELEASE_PATCH 0