-

pkgs/leak_tracker/lib/src/leak_tracking/_object_tracker.dart

@@ -287,4 +287,7 @@ class ObjectTracker implements LeakProvider {
   }
 
   int get notGCed => _objects.notGCed.length;
+
+  void forEach(void Function(ObjectRecord) callback) =>
+      _objects.notGCed.forEach(callback);
 }

pkgs/leak_tracker/lib/src/leak_tracking/leak_tracking.dart

@@ -7,6 +7,7 @@ import '../shared/_primitives.dart';
 import '../shared/shared_model.dart';
 import '_baseliner.dart';
 import '_leak_tracker.dart';
+import '_object_record.dart';
 import 'primitives/_dispatcher.dart' as dispatcher;
 import 'primitives/model.dart';
 
@@ -130,6 +131,10 @@ abstract class LeakTracking {
     required Object object,
     Map<String, dynamic>? context,
   }) {
+    if (object.runtimeType.toString() == 'CkPicture') {
+      final code = identityHashCode(object);
+      print('!!! CkPicture created: $code');
+    }
     assert(() {
       _baseliner?.takeSample();
       if (phase.ignoredLeaks.isIgnored(className)) return true;
@@ -227,4 +232,8 @@ abstract class LeakTracking {
   static void declareNotDisposedObjectsAsLeaks() {
     _leakTracker?.objectTracker.declareAllNotDisposedAsLeaks();
   }
+
+  /// Performs an operation for each object, not detected as GCed.
+  static void forEach(void Function(ObjectRecord) callback) =>
+      _leakTracker?.objectTracker.forEach(callback);
 }

pkgs/web_tests/test/test_infra/memory_leak_tests.dart

@@ -85,13 +85,41 @@ final List<LeakTestCase> memoryLeakTests = <LeakTestCase>[
       PumpWidgetsCallback? pumpWidgets,
       RunAsyncCallback<dynamic>? runAsync,
     ) async {
+      printStats();
       await pumpWidgets!(MyApp());
-      await runAsync!(() => Future.delayed(const Duration(seconds: 3)));
+
+      printStats();
+      await runAsync!(() => Future.delayed(const Duration(seconds: 1)));
+      printStats();
+      await runAsync(() => Future.delayed(const Duration(seconds: 1)));
+      printStats();
+      await runAsync(() => Future.delayed(const Duration(seconds: 1)));
+      printStats();
     },
     notDisposedTotal: 0,
   ),
 ];
 
+void printStats() {
+  final notDisposed = <String, int>{};
+  LeakTracking.forEach((r) {
+    if (r.isDisposed) return;
+    final type = r.type.toString();
+    if (!type.contains('Picture') && !type.contains('picture')) return;
+    notDisposed[type] = notDisposed[type] ?? 0 + 1;
+  });
+
+  if (notDisposed.isEmpty) {
+    print('No not disposed');
+    return;
+  }
+
+  print('!!!! Not disposed:');
+  for (final entry in notDisposed.entries) {
+    print('${entry.key}: ${entry.value}');
+  }
+}
+
 String memoryLeakTestsFilePath() {
   final result = RegExp(
     r'(\/[^\/]*_tests.dart.js)',