| // 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 |
| |
| import "package:expect/expect.dart"; |
| |
| class Mixin { |
| var field; |
| createIt() { |
| if (field == null) field = 42; |
| } |
| } |
| |
| class A { |
| A(foo); |
| } |
| |
| class B extends A with Mixin { |
| // Because [super] references a synthesized constructor, dart2js |
| // used to not see the null assignment to it. |
| B(foo) : super(foo); |
| } |
| |
| main() { |
| var a = new B(42); |
| a.createIt(); |
| Expect.equals(42, a.field); |
| } |