| // Copyright (c) 2018, 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. |
| |
| class Thing {} |
| |
| class SubThing extends Thing { |
| void sub() {} |
| } |
| |
| class A { |
| Thing get thing => new Thing(); |
| } |
| |
| mixin B implements A { |
| @override |
| SubThing get thing; |
| } |
| |
| class C extends A with B {} |
| // ^ |
| // [analyzer] COMPILE_TIME_ERROR.INVALID_IMPLEMENTATION_OVERRIDE |
| // [cfe] The implementation of 'thing' in the non-abstract class 'C' does not conform to its interface. |
| |
| main() { |
| new C().thing.sub(); |
| } |
