Version 3.3.0-188.0.dev

Merge fc4b352 into dev

DEPS

@@ -55,7 +55,7 @@ vars = {
 
   # co19 is a cipd package automatically generated for each co19 commit.
   # Use tests/co19/update.sh to update this hash.
-  "co19_rev": "85c868a325bc92f4e743958077ad0ad2eb58c81f",
+  "co19_rev": "2ba55b45d85fece505a503dd12cf1c708825b74f",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
   "benchmarks_internal_rev": "f048a4a853e3062056d39c3db100acdde42f16d6",

pkg/compiler/lib/src/dart2js.dart

@@ -14,9 +14,9 @@ import 'package:front_end/src/api_unstable/dart2js.dart' as fe;
 import '../compiler_api.dart' as api;
 import 'commandline_options.dart';
 import 'common/ram_usage.dart';
+import 'compiler.dart' as defaultCompiler show Compiler;
 import 'io/mapped_file.dart';
 import 'options.dart' show CompilerOptions, Dart2JSStage, FeatureOptions;
-import 'compiler.dart' as defaultCompiler show Compiler;
 import 'source_file_provider.dart';
 import 'util/command_line.dart';
 import 'util/util.dart' show stackTraceFilePrefix;
@@ -982,7 +982,8 @@ Usage: dart compile js [arguments] <dart entry point>
      -O2          Safe production-oriented optimizations (like minification).
      -O3          Potentially unsafe optimizations (see -h -v for details).
      -O4          More agressive unsafe optimizations (see -h -v for details).
-  ''');
+'''
+      .trim());
 }
 
 void verboseHelp() {

pkg/dart2wasm/lib/translator.dart

@@ -570,7 +570,7 @@ class Translator with KernelNodes {
     }
     if (type is TypeParameterType) {
       return translateStorageType(nullable
-          ? type.bound.withDeclaredNullability(type.nullability)
+          ? type.bound.withDeclaredNullability(Nullability.nullable)
           : type.bound);
     }
     if (type is IntersectionType) {

sdk/lib/_internal/wasm/lib/list.dart

@@ -23,7 +23,9 @@ abstract class _ListBase<E> extends ListBase<E> {
   _ListBase._withData(this._length, this._data);
 
   E operator [](int index) {
-    IndexError.check(index, _length, indexable: this, name: "[]");
+    if (WasmI64.fromInt(_length).leU(WasmI64.fromInt(index))) {
+      throw IndexError.withLength(index, length, name: "[]");
+    }
     return unsafeCast(_data.read(index));
   }
 
@@ -58,7 +60,9 @@ abstract class _ModifiableList<E> extends _ListBase<E> {
       : super._withData(length, data);
 
   void operator []=(int index, E value) {
-    IndexError.check(index, _length, indexable: this, name: "[]=");
+    if (WasmI64.fromInt(_length).leU(WasmI64.fromInt(index))) {
+      throw IndexError.withLength(index, length, name: "[]=");
+    }
     _data.write(index, value);
   }
 

tests/language/extension_type/regress_53968_test.dart

@@ -0,0 +1,17 @@
+// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// SharedOptions=--enable-experiment=inline-class
+
+// Regression check for https://dartbug.com/53968
+
+extension type A(int a) {}
+
+T returnA<T extends A?>() {
+  return null as T;
+}
+
+void main() {
+  returnA();
+}

tools/VERSION

@@ -27,5 +27,5 @@ CHANNEL dev
 MAJOR 3
 MINOR 3
 PATCH 0
-PRERELEASE 187
+PRERELEASE 188
 PRERELEASE_PATCH 0