// Copyright (c) 2013, 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.

// @dart = 2.9

// Regression test for dart2js that used to miscompile classes
// extending HashMap, because HashMap is patched.

import "package:expect/expect.dart";

import 'dart:collection';

class Foo extends Expando {}

main() {
  Expect.isNull(new Foo()[new Object()]);
}