diff --git a/dev/automated_tests/pubspec.yaml b/dev/automated_tests/pubspec.yaml
index be725d0701..a5aa9ef436 100644
--- a/dev/automated_tests/pubspec.yaml
+++ b/dev/automated_tests/pubspec.yaml
@@ -28,7 +28,7 @@ dependencies:
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -68,4 +68,4 @@ flutter:
   assets:
   - icon/
 
-# PUBSPEC CHECKSUM: f55e
+# PUBSPEC CHECKSUM: 9d5f
diff --git a/dev/benchmarks/complex_layout/pubspec.yaml b/dev/benchmarks/complex_layout/pubspec.yaml
index fe51f7f92d..c4e2cd1970 100644
--- a/dev/benchmarks/complex_layout/pubspec.yaml
+++ b/dev/benchmarks/complex_layout/pubspec.yaml
@@ -50,7 +50,7 @@ dev_dependencies:
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -84,4 +84,4 @@ flutter:
     - packages/flutter_gallery_assets/people/square/ali.png
     - packages/flutter_gallery_assets/places/india_chettinad_silk_maker.png
 
-# PUBSPEC CHECKSUM: a16d
+# PUBSPEC CHECKSUM: 896e
diff --git a/dev/benchmarks/macrobenchmarks/pubspec.yaml b/dev/benchmarks/macrobenchmarks/pubspec.yaml
index 883b8c1202..c7864cc14c 100644
--- a/dev/benchmarks/macrobenchmarks/pubspec.yaml
+++ b/dev/benchmarks/macrobenchmarks/pubspec.yaml
@@ -50,7 +50,7 @@ dev_dependencies:
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -209,4 +209,4 @@ flutter:
       fonts:
         - asset: packages/flutter_gallery_assets/fonts/GalleryIcons.ttf
 
-# PUBSPEC CHECKSUM: a16d
+# PUBSPEC CHECKSUM: 896e
diff --git a/dev/benchmarks/microbenchmarks/pubspec.yaml b/dev/benchmarks/microbenchmarks/pubspec.yaml
index 06277eb882..40ecfc9a92 100644
--- a/dev/benchmarks/microbenchmarks/pubspec.yaml
+++ b/dev/benchmarks/microbenchmarks/pubspec.yaml
@@ -31,7 +31,7 @@ dependencies:
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http: 0.13.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   intl: 0.17.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -70,4 +70,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: de15
+# PUBSPEC CHECKSUM: ba16
diff --git a/dev/benchmarks/platform_views_layout/pubspec.yaml b/dev/benchmarks/platform_views_layout/pubspec.yaml
index 0f221797d3..ef7bee2cfc 100644
--- a/dev/benchmarks/platform_views_layout/pubspec.yaml
+++ b/dev/benchmarks/platform_views_layout/pubspec.yaml
@@ -48,7 +48,7 @@ dev_dependencies:
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -82,4 +82,4 @@ flutter:
     - packages/flutter_gallery_assets/people/square/ali.png
     - packages/flutter_gallery_assets/places/india_chettinad_silk_maker.png
 
-# PUBSPEC CHECKSUM: a16d
+# PUBSPEC CHECKSUM: 896e
diff --git a/dev/benchmarks/platform_views_layout_hybrid_composition/pubspec.yaml b/dev/benchmarks/platform_views_layout_hybrid_composition/pubspec.yaml
index 0871ac7683..92026eb2cf 100644
--- a/dev/benchmarks/platform_views_layout_hybrid_composition/pubspec.yaml
+++ b/dev/benchmarks/platform_views_layout_hybrid_composition/pubspec.yaml
@@ -48,7 +48,7 @@ dev_dependencies:
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -82,4 +82,4 @@ flutter:
     - packages/flutter_gallery_assets/people/square/ali.png
     - packages/flutter_gallery_assets/places/india_chettinad_silk_maker.png
 
-# PUBSPEC CHECKSUM: a16d
+# PUBSPEC CHECKSUM: 896e
diff --git a/dev/benchmarks/test_apps/stocks/pubspec.yaml b/dev/benchmarks/test_apps/stocks/pubspec.yaml
index b555588aca..95b3ebef32 100644
--- a/dev/benchmarks/test_apps/stocks/pubspec.yaml
+++ b/dev/benchmarks/test_apps/stocks/pubspec.yaml
@@ -46,7 +46,7 @@ dev_dependencies:
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 1.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -77,4 +77,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 3589
+# PUBSPEC CHECKSUM: 518a
diff --git a/dev/bots/pubspec.yaml b/dev/bots/pubspec.yaml
index 63a9734f75..ecacfa6d67 100644
--- a/dev/bots/pubspec.yaml
+++ b/dev/bots/pubspec.yaml
@@ -28,7 +28,7 @@ dependencies:
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http: 0.13.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 1.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -61,4 +61,4 @@ dependencies:
 dev_dependencies:
   test_api: 0.3.0
 
-# PUBSPEC CHECKSUM: a88d
+# PUBSPEC CHECKSUM: 668e
diff --git a/dev/bots/test.dart b/dev/bots/test.dart
index 9dc80db061..245c865df6 100644
--- a/dev/bots/test.dart
+++ b/dev/bots/test.dart
@@ -306,11 +306,62 @@ Future<void> _runToolTests() async {
   });
 }
 
+Future<void> runForbiddenFromReleaseTests() async {
+  // Build a release APK to get the snapshot json.
+  final Directory tempDirectory = Directory.systemTemp.createTempSync('forbidden_imports');
+  final List<String> command = <String>[
+    'build',
+    'apk',
+    '--target-platform',
+    'android-arm64',
+    '--release',
+    '--analyze-size',
+    '--code-size-directory',
+    tempDirectory.path,
+    '-v',
+  ];
+
+  await runCommand(
+    flutter,
+    command,
+    workingDirectory: path.join(flutterRoot, 'examples', 'hello_world'),
+  );
+
+  // First, a smoke test.
+  final List<String> smokeTestArgs = <String>[
+    path.join(flutterRoot, 'dev', 'forbidden_from_release_tests', 'bin', 'main.dart'),
+    '--snapshot', path.join(tempDirectory.path, 'snapshot.arm64-v8a.json'),
+    '--package-config', path.join(flutterRoot, 'examples', 'hello_world', '.dart_tool', 'package_config.json'),
+    '--forbidden-type', 'package:flutter/src/widgets/framework.dart::Widget',
+  ];
+  await runCommand(
+    dart,
+    smokeTestArgs,
+    workingDirectory: flutterRoot,
+    expectNonZeroExit: true,
+  );
+
+  // Actual test.
+  final List<String> args = <String>[
+    path.join(flutterRoot, 'dev', 'forbidden_from_release_tests', 'bin', 'main.dart'),
+    '--snapshot', path.join(tempDirectory.path, 'snapshot.arm64-v8a.json'),
+    '--package-config', path.join(flutterRoot, 'examples', 'hello_world', '.dart_tool', 'package_config.json'),
+    '--forbidden-type', 'package:flutter/src/widgets/widget_inspector.dart::WidgetInspectorService',
+  ];
+  await runCommand(
+    dart,
+    args,
+    workingDirectory: flutterRoot,
+  );
+}
+
 /// Verifies that APK, and IPA (if on macOS) builds the examples apps
 /// without crashing. It does not actually launch the apps. That happens later
 /// in the devicelab. This is just a smoke-test. In particular, this will verify
 /// we can build when there are spaces in the path name for the Flutter SDK and
 /// target app.
+///
+/// Also does some checking about types included in hello_world.
 Future<void> _runBuildTests() async {
   final List<FileSystemEntity> exampleDirectories = Directory(path.join(flutterRoot, 'examples')).listSync()
     ..add(Directory(path.join(flutterRoot, 'packages', 'integration_test', 'example')))
@@ -340,6 +391,7 @@ Future<void> _runBuildTests() async {
             path.join('lib', 'dart_io_import.dart'),
           ),
     ],
+    runForbiddenFromReleaseTests,
   ]..shuffle(math.Random(0));
 
   await _runShardRunnerIndexOfTotalSubshard(tests);
diff --git a/dev/customer_testing/pubspec.yaml b/dev/customer_testing/pubspec.yaml
index f98cc6c384..55a8605f17 100644
--- a/dev/customer_testing/pubspec.yaml
+++ b/dev/customer_testing/pubspec.yaml
@@ -29,7 +29,7 @@ dev_dependencies:
   convert: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -57,4 +57,4 @@ dev_dependencies:
   webkit_inspection_protocol: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: 3e4c
+# PUBSPEC CHECKSUM: c14d
diff --git a/dev/devicelab/pubspec.yaml b/dev/devicelab/pubspec.yaml
index 72c81f83b1..480033f045 100644
--- a/dev/devicelab/pubspec.yaml
+++ b/dev/devicelab/pubspec.yaml
@@ -39,7 +39,7 @@ dev_dependencies:
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   matcher: 0.12.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -63,4 +63,4 @@ dev_dependencies:
   webkit_inspection_protocol: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: a88d
+# PUBSPEC CHECKSUM: 668e
diff --git a/dev/forbidden_from_release_tests/README.md b/dev/forbidden_from_release_tests/README.md
new file mode 100644
index 0000000000..0c6e553aa1
--- /dev/null
+++ b/dev/forbidden_from_release_tests/README.md
@@ -0,0 +1,11 @@
+# Forbidden from release tests
+
+This program compiles the Dart portions of a Flutter application to the
+AOT format used for release builds, and verifies that debugging related types
+are not retained. By default, it uses the `//examples/hello_world` application
+in this repository.
+
+This harness is invoked from `dev/bots/test.dart`. By default it uses the
+`examples/hello_world.dart` as if it were being compiled for Android arm64
+release. New forbidden types may be added by adding more `--forbidden-type`
+options in the `runForbiddenFromReleaseTests` method in `dev/bots/test.dart`
diff --git a/dev/forbidden_from_release_tests/bin/main.dart b/dev/forbidden_from_release_tests/bin/main.dart
new file mode 100644
index 0000000000..2d45c52eda
--- /dev/null
+++ b/dev/forbidden_from_release_tests/bin/main.dart
@@ -0,0 +1,160 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// @dart=2.9
+// TODO(dnfield): migrate this once vm_snapshot_analysis is migrated.
+// https://github.com/dart-lang/sdk/issues/45683
+
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:args/args.dart';
+import 'package:file/file.dart';
+import 'package:file/local.dart';
+import 'package:meta/meta.dart';
+import 'package:package_config/package_config.dart';
+import 'package:path/path.dart' as path;
+import 'package:process/process.dart';
+import 'package:vm_snapshot_analysis/program_info.dart';
+import 'package:vm_snapshot_analysis/v8_profile.dart';
+
+const ProcessManager processManager = LocalProcessManager();
+const FileSystem fs = LocalFileSystem();
+
+Future<void> main(List<String> args) async {
+  final Options options = Options.fromArgs(args);
+  final String json = options.snapshot.readAsStringSync();
+  final Snapshot snapshot = Snapshot.fromJson(jsonDecode(json) as Map<String, dynamic>);
+  final ProgramInfo programInfo = toProgramInfo(snapshot);
+
+  final List<String> foundForbiddenTypes = <String>[];
+  bool fail = false;
+  for (final String forbiddenType in options.forbiddenTypes) {
+    final int slash = forbiddenType.indexOf('/');
+    final int doubleColons = forbiddenType.indexOf('::');
+    if (slash == -1 || doubleColons < 2) {
+      print('Invalid forbidden type "$forbiddenType". The format must be <package_uri>::<type_name>, e.g. package:flutter/src/widgets/framework.dart::Widget');
+      fail = true;
+      continue;
+    }
+
+    if (!await validateType(forbiddenType, options.packageConfig)) {
+      foundForbiddenTypes.add('Forbidden type "$forbiddenType" does not seem to exist.');
+      continue;
+    }
+
+    final List<String> lookupPath = <String>[
+      forbiddenType.substring(0, slash),
+      forbiddenType.substring(0, doubleColons),
+      forbiddenType.substring(doubleColons + 2),
+    ];
+    if (programInfo.lookup(lookupPath) != null) {
+      foundForbiddenTypes.add(forbiddenType);
+    }
+  }
+  if (fail) {
+    print('Invalid forbidden type formats. Exiting.');
+    exit(-1);
+  }
+  if (foundForbiddenTypes.isNotEmpty) {
+    print('The output contained the following forbidden types:');
+    print(foundForbiddenTypes.join('\n'));
+    exit(-1);
+  }
+
+  print('No forbidden types found.');
+}
+
+Future<bool> validateType(String forbiddenType, File packageConfigFile) async {
+  if (!forbiddenType.startsWith('package:')) {
+    print('Warning: Unable to validate $forbiddenType. Continuing.');
+    return true;
+  }
+
+  final Uri packageUri = Uri.parse(forbiddenType.substring(0, forbiddenType.indexOf('::')));
+  final String typeName = forbiddenType.substring(forbiddenType.indexOf('::') + 2);
+
+  final PackageConfig packageConfig = PackageConfig.parseString(
+    packageConfigFile.readAsStringSync(),
+    packageConfigFile.uri,
+  );
+  final Uri packageFileUri = packageConfig.resolve(packageUri);
+  final File packageFile = fs.file(packageFileUri);
+  if (!packageFile.existsSync()) {
+    print('File $packageFile does not exist - forbidden type has moved or been removed.');
+    return false;
+  }
+
+  // This logic is imperfect. It will not detect mixed in types the way that
+  // the snapshot has them, e.g. TypeName&MixedIn&Whatever. It also assumes
+  // there is at least one space before and after the type name, which is not
+  // strictly required by the language.
+  final List<String> contents = packageFile.readAsStringSync().split('\n');
+  for (final String line in contents) {
+    // Ignore comments.
+    // This will fail for multi- and intra-line comments (i.e. /* */).
+    if (line.trim().startsWith('//')) {
+      continue;
+    }
+    if (line.contains(' $typeName ')) {
+      return true;
+    }
+  }
+  return false;
+}
+
+class Options {
+  const Options({
+    @required this.snapshot,
+    @required this.packageConfig,
+    @required this.forbiddenTypes,
+  });
+
+  factory Options.fromArgs(List<String> args) {
+    final ArgParser argParser = ArgParser();
+    argParser.addOption(
+      'snapshot',
+      help: 'The path V8 snapshot file.',
+      valueHelp: '/tmp/snapshot.arm64-v8a.json',
+    );
+    argParser.addOption(
+      'package-config',
+      help: 'Dart package_config.json file generated by `pub get`.',
+      valueHelp: path.join(r'$FLUTTER_ROOT', 'examples', 'hello_world', '.dart_tool', 'package_config.json'),
+      defaultsTo: path.join(fs.currentDirectory.path, 'examples', 'hello_world', '.dart_tool', 'package_config.json'),
+    );
+    argParser.addMultiOption(
+      'forbidden-type',
+      help: 'Type name(s) to forbid from release compilation, e.g. "package:flutter/src/widgets/framework.dart::Widget".',
+      valueHelp: '<package_uri>::<type_name>',
+    );
+
+    argParser.addFlag('help', help: 'Prints usage.', negatable: false);
+    final ArgResults argResults = argParser.parse(args);
+
+    if (argResults['help'] == true) {
+      print(argParser.usage);
+      exit(0);
+    }
+
+    return Options(
+      snapshot: _getFileArg(argResults, 'snapshot'),
+      packageConfig: _getFileArg(argResults, 'package-config'),
+      forbiddenTypes: Set<String>.from(argResults['forbidden-type'] as List<String>),
+    );
+  }
+
+  final File snapshot;
+  final File packageConfig;
+  final Set<String> forbiddenTypes;
+
+  static File _getFileArg(ArgResults argResults, String argName) {
+    final File result = fs.file(argResults[argName] as String);
+    if (!result.existsSync()) {
+      print('The $argName file at $result could not be found.');
+      exit(-1);
+    }
+    return result;
+  }
+}
diff --git a/dev/forbidden_from_release_tests/pubspec.yaml b/dev/forbidden_from_release_tests/pubspec.yaml
new file mode 100644
index 0000000000..5bf34e2418
--- /dev/null
+++ b/dev/forbidden_from_release_tests/pubspec.yaml
@@ -0,0 +1,18 @@
+name: forbidden_from_release_tests
+publish_to: 'none'
+
+environment:
+  sdk: '>=2.12.0 <3.0.0'
+
+dependencies:
+  args: 2.0.0
+  file: 6.1.0
+  package_config: 2.0.0
+  path: 1.8.0
+  process: 4.2.1
+  vm_snapshot_analysis: 0.6.0
+
+  meta: 1.3.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  platform: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+
+# PUBSPEC CHECKSUM: 6b98
diff --git a/dev/integration_tests/android_semantics_testing/pubspec.yaml b/dev/integration_tests/android_semantics_testing/pubspec.yaml
index 266d8b425b..2da4bb4a22 100644
--- a/dev/integration_tests/android_semantics_testing/pubspec.yaml
+++ b/dev/integration_tests/android_semantics_testing/pubspec.yaml
@@ -25,7 +25,7 @@ dependencies:
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -65,4 +65,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: db19
+# PUBSPEC CHECKSUM: c31a
diff --git a/dev/integration_tests/android_views/pubspec.yaml b/dev/integration_tests/android_views/pubspec.yaml
index bf06294181..22bb85a59a 100644
--- a/dev/integration_tests/android_views/pubspec.yaml
+++ b/dev/integration_tests/android_views/pubspec.yaml
@@ -60,7 +60,7 @@ dev_dependencies:
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -91,4 +91,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 4bca
+# PUBSPEC CHECKSUM: 09cb
diff --git a/dev/integration_tests/channels/pubspec.yaml b/dev/integration_tests/channels/pubspec.yaml
index ba436d9257..c7c50c8018 100644
--- a/dev/integration_tests/channels/pubspec.yaml
+++ b/dev/integration_tests/channels/pubspec.yaml
@@ -26,7 +26,7 @@ dependencies:
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -66,4 +66,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: db19
+# PUBSPEC CHECKSUM: c31a
diff --git a/dev/integration_tests/external_ui/pubspec.yaml b/dev/integration_tests/external_ui/pubspec.yaml
index 5c6b29ba1a..34884ddf0f 100644
--- a/dev/integration_tests/external_ui/pubspec.yaml
+++ b/dev/integration_tests/external_ui/pubspec.yaml
@@ -26,7 +26,7 @@ dependencies:
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -66,4 +66,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: db19
+# PUBSPEC CHECKSUM: c31a
diff --git a/dev/integration_tests/flavors/pubspec.yaml b/dev/integration_tests/flavors/pubspec.yaml
index d772b195e3..25c7e7ee89 100644
--- a/dev/integration_tests/flavors/pubspec.yaml
+++ b/dev/integration_tests/flavors/pubspec.yaml
@@ -26,7 +26,7 @@ dependencies:
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -66,4 +66,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: db19
+# PUBSPEC CHECKSUM: c31a
diff --git a/dev/integration_tests/flutter_gallery/pubspec.yaml b/dev/integration_tests/flutter_gallery/pubspec.yaml
index 56ff2a6c3c..a72ebd480c 100644
--- a/dev/integration_tests/flutter_gallery/pubspec.yaml
+++ b/dev/integration_tests/flutter_gallery/pubspec.yaml
@@ -75,7 +75,7 @@ dev_dependencies:
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 1.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -273,4 +273,4 @@ flutter:
       - asset: packages/flutter_gallery_assets/fonts/merriweather/Merriweather-Regular.ttf
       - asset: packages/flutter_gallery_assets/fonts/merriweather/Merriweather-Light.ttf
 
-# PUBSPEC CHECKSUM: 4f1e
+# PUBSPEC CHECKSUM: a51f
diff --git a/dev/integration_tests/hybrid_android_views/pubspec.yaml b/dev/integration_tests/hybrid_android_views/pubspec.yaml
index 7938aa902d..ab5757295d 100644
--- a/dev/integration_tests/hybrid_android_views/pubspec.yaml
+++ b/dev/integration_tests/hybrid_android_views/pubspec.yaml
@@ -60,7 +60,7 @@ dev_dependencies:
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -91,4 +91,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 4bca
+# PUBSPEC CHECKSUM: 09cb
diff --git a/dev/integration_tests/ios_platform_view_tests/pubspec.yaml b/dev/integration_tests/ios_platform_view_tests/pubspec.yaml
index 23c2148fac..dbf9012c77 100644
--- a/dev/integration_tests/ios_platform_view_tests/pubspec.yaml
+++ b/dev/integration_tests/ios_platform_view_tests/pubspec.yaml
@@ -37,7 +37,7 @@ dev_dependencies:
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -78,4 +78,4 @@ flutter:
   # the material Icons class.
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: b7d2
+# PUBSPEC CHECKSUM: 9fd3
diff --git a/dev/integration_tests/platform_interaction/pubspec.yaml b/dev/integration_tests/platform_interaction/pubspec.yaml
index e69edffeb4..2a3718ac8a 100644
--- a/dev/integration_tests/platform_interaction/pubspec.yaml
+++ b/dev/integration_tests/platform_interaction/pubspec.yaml
@@ -26,7 +26,7 @@ dependencies:
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -66,4 +66,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: db19
+# PUBSPEC CHECKSUM: c31a
diff --git a/dev/integration_tests/ui/pubspec.yaml b/dev/integration_tests/ui/pubspec.yaml
index ea688a27a9..0a91d58273 100644
--- a/dev/integration_tests/ui/pubspec.yaml
+++ b/dev/integration_tests/ui/pubspec.yaml
@@ -32,7 +32,7 @@ dependencies:
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -81,4 +81,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 4bc7
+# PUBSPEC CHECKSUM: 83c8
diff --git a/dev/integration_tests/web_e2e_tests/pubspec.yaml b/dev/integration_tests/web_e2e_tests/pubspec.yaml
index b2ee78e869..445e2f545c 100644
--- a/dev/integration_tests/web_e2e_tests/pubspec.yaml
+++ b/dev/integration_tests/web_e2e_tests/pubspec.yaml
@@ -39,7 +39,7 @@ dev_dependencies:
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -73,4 +73,4 @@ dev_dependencies:
   webkit_inspection_protocol: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: b811
+# PUBSPEC CHECKSUM: a012
diff --git a/dev/snippets/pubspec.yaml b/dev/snippets/pubspec.yaml
index 82a134ce4b..e29203133e 100644
--- a/dev/snippets/pubspec.yaml
+++ b/dev/snippets/pubspec.yaml
@@ -43,7 +43,7 @@ dev_dependencies:
 
   boolean_selector: 2.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -95,4 +95,4 @@ executables:
   vm_service_client: 0.2.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.0.9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: 0f87
+# PUBSPEC CHECKSUM: b088
diff --git a/dev/tools/pubspec.yaml b/dev/tools/pubspec.yaml
index bf6a67bd38..36b940a3b6 100644
--- a/dev/tools/pubspec.yaml
+++ b/dev/tools/pubspec.yaml
@@ -38,7 +38,7 @@ dev_dependencies:
   convert: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 1.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -63,4 +63,4 @@ dev_dependencies:
   webkit_inspection_protocol: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: b14f
+# PUBSPEC CHECKSUM: 8750
diff --git a/examples/hello_world/pubspec.yaml b/examples/hello_world/pubspec.yaml
index 7f559dd35a..3d424afd0a 100644
--- a/examples/hello_world/pubspec.yaml
+++ b/examples/hello_world/pubspec.yaml
@@ -35,7 +35,7 @@ dev_dependencies:
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -69,4 +69,4 @@ dev_dependencies:
   webkit_inspection_protocol: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: b7d2
+# PUBSPEC CHECKSUM: 9fd3
diff --git a/examples/platform_channel/pubspec.yaml b/examples/platform_channel/pubspec.yaml
index 2623be9662..6b38c951ce 100644
--- a/examples/platform_channel/pubspec.yaml
+++ b/examples/platform_channel/pubspec.yaml
@@ -35,7 +35,7 @@ dev_dependencies:
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -72,4 +72,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: b7d2
+# PUBSPEC CHECKSUM: 9fd3
diff --git a/examples/platform_channel_swift/pubspec.yaml b/examples/platform_channel_swift/pubspec.yaml
index 3c63dfd803..b7d0b34301 100644
--- a/examples/platform_channel_swift/pubspec.yaml
+++ b/examples/platform_channel_swift/pubspec.yaml
@@ -35,7 +35,7 @@ dev_dependencies:
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -72,4 +72,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: b7d2
+# PUBSPEC CHECKSUM: 9fd3
diff --git a/packages/flutter/lib/src/widgets/binding.dart b/packages/flutter/lib/src/widgets/binding.dart
index 4c7f97cc70..03bd0eaa95 100644
--- a/packages/flutter/lib/src/widgets/binding.dart
+++ b/packages/flutter/lib/src/widgets/binding.dart
@@ -290,7 +290,10 @@ mixin WidgetsBinding on BindingBase, ServicesBinding, SchedulerBinding, GestureB
     window.onLocaleChanged = handleLocaleChanged;
     window.onAccessibilityFeaturesChanged = handleAccessibilityFeaturesChanged;
     SystemChannels.navigation.setMethodCallHandler(_handleNavigationInvocation);
-    FlutterErrorDetails.propertiesTransformers.add(transformDebugCreator);
+    assert(() {
+      FlutterErrorDetails.propertiesTransformers.add(debugTransformDebugCreator);
+      return true;
+    }());
   }
 
   void _debugAddStackFilters() {
diff --git a/packages/flutter/lib/src/widgets/widget_inspector.dart b/packages/flutter/lib/src/widgets/widget_inspector.dart
index cad2636c66..34ea38dc9f 100644
--- a/packages/flutter/lib/src/widgets/widget_inspector.dart
+++ b/packages/flutter/lib/src/widgets/widget_inspector.dart
@@ -2892,7 +2892,12 @@ bool _isDebugCreator(DiagnosticsNode node) => node is DiagnosticsDebugCreator;
 ///
 /// This function will be registered to [FlutterErrorDetails.propertiesTransformers]
 /// in [WidgetsBinding.initInstances].
-Iterable<DiagnosticsNode> transformDebugCreator(Iterable<DiagnosticsNode> properties) sync* {
+///
+/// This is meant to be called only in debug mode. In other modes, it yields an empty list.
+Iterable<DiagnosticsNode> debugTransformDebugCreator(Iterable<DiagnosticsNode> properties) sync* {
+  if (!kDebugMode) {
+    return;
+  }
   final List<DiagnosticsNode> pending = <DiagnosticsNode>[];
   ErrorSummary? errorSummary;
   for (final DiagnosticsNode node in properties) {
@@ -2962,8 +2967,6 @@ Iterable<DiagnosticsNode> _describeRelevantUserCode(
     // TODO(chunhtai): should print out all the widgets that are about to cross
     // package boundaries.
     if (debugIsLocalCreationLocation(target)) {
-
-
       DiagnosticsNode? devToolsDiagnostic;
 
       // TODO(kenz): once the inspector is better at dealing with broken trees,
diff --git a/packages/flutter/test/widgets/widget_inspector_test.dart b/packages/flutter/test/widgets/widget_inspector_test.dart
index aa2d11d2b7..3c8b5722ad 100644
--- a/packages/flutter/test/widgets/widget_inspector_test.dart
+++ b/packages/flutter/test/widgets/widget_inspector_test.dart
@@ -1018,7 +1018,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
       builder.add(DiagnosticsStackTrace('When the exception was thrown, this was the stack', null));
       builder.add(DiagnosticsDebugCreator(DebugCreator(elementA)));
 
-      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(transformDebugCreator(builder.properties));
+      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(debugTransformDebugCreator(builder.properties));
       expect(nodes.length, 5);
       expect(nodes[0].runtimeType, StringProperty);
       expect(nodes[0].name, 'dummy1');
@@ -1080,7 +1080,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
       builder.add(StringProperty('dummy2', 'value'));
       builder.add(DiagnosticsStackTrace('When the exception was thrown, this was the stack', null));
 
-      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(transformDebugCreator(builder.properties));
+      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(debugTransformDebugCreator(builder.properties));
       expect(nodes.length, 5);
       expect(nodes[0].runtimeType, StringProperty);
       expect(nodes[0].name, 'dummy1');
@@ -1128,7 +1128,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
       builder.add(DiagnosticsDebugCreator(DebugCreator(elementA)));
       builder.add(StringProperty('dummy2', 'value'));
 
-      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(transformDebugCreator(builder.properties));
+      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(debugTransformDebugCreator(builder.properties));
       expect(nodes.length, 6);
       expect(nodes[0].runtimeType, ErrorSummary);
       expect(nodes[1].runtimeType, DiagnosticsBlock);
@@ -1162,7 +1162,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
       builder.add(DiagnosticsDebugCreator(DebugCreator(elementA)));
       builder.add(StringProperty('dummy2', 'value'));
 
-      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(transformDebugCreator(builder.properties));
+      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(debugTransformDebugCreator(builder.properties));
       expect(nodes.length, 4);
       expect(nodes[0].runtimeType, ErrorSummary);
       expect(nodes[1].runtimeType, DiagnosticsBlock);
@@ -1194,7 +1194,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
       builder.add(DiagnosticsDebugCreator(DebugCreator(elementA)));
       builder.add(StringProperty('dummy2', 'value'));
 
-      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(transformDebugCreator(builder.properties));
+      final List<DiagnosticsNode> nodes = List<DiagnosticsNode>.from(debugTransformDebugCreator(builder.properties));
       expect(nodes.length, 4);
       expect(nodes[0].runtimeType, ErrorSummary);
       expect(nodes[1].runtimeType, DiagnosticsBlock);
diff --git a/packages/flutter_driver/pubspec.yaml b/packages/flutter_driver/pubspec.yaml
index 2575d6437a..ca9a27e652 100644
--- a/packages/flutter_driver/pubspec.yaml
+++ b/packages/flutter_driver/pubspec.yaml
@@ -51,7 +51,7 @@ dev_dependencies:
   convert: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -74,4 +74,4 @@ dev_dependencies:
   webkit_inspection_protocol: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: 23d5
+# PUBSPEC CHECKSUM: 45d6
diff --git a/packages/flutter_tools/pubspec.yaml b/packages/flutter_tools/pubspec.yaml
index 62a7a1beda..847ce39200 100644
--- a/packages/flutter_tools/pubspec.yaml
+++ b/packages/flutter_tools/pubspec.yaml
@@ -45,7 +45,7 @@ dependencies:
   path: 1.8.0
   mime: 1.0.0
   logging: 1.0.1
-  http_multi_server: 3.0.0
+  http_multi_server: 3.0.1
   convert: 3.0.0
   async: 2.5.0
 
@@ -108,4 +108,4 @@ dartdoc:
   # Exclude this package from the hosted API docs.
   nodoc: true
 
-# PUBSPEC CHECKSUM: e452
+# PUBSPEC CHECKSUM: 0d53
diff --git a/packages/fuchsia_remote_debug_protocol/pubspec.yaml b/packages/fuchsia_remote_debug_protocol/pubspec.yaml
index f13ced7f09..01a9c74a25 100644
--- a/packages/fuchsia_remote_debug_protocol/pubspec.yaml
+++ b/packages/fuchsia_remote_debug_protocol/pubspec.yaml
@@ -30,7 +30,7 @@ dev_dependencies:
   coverage: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -61,4 +61,4 @@ dev_dependencies:
   webkit_inspection_protocol: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: 3e4f
+# PUBSPEC CHECKSUM: fb50
diff --git a/packages/integration_test/example/pubspec.yaml b/packages/integration_test/example/pubspec.yaml
index de5e0d1edd..868a20bf1c 100644
--- a/packages/integration_test/example/pubspec.yaml
+++ b/packages/integration_test/example/pubspec.yaml
@@ -48,7 +48,7 @@ dev_dependencies:
   fake_async: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 6.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -84,4 +84,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: c177
+# PUBSPEC CHECKSUM: a978