| // 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. | |
| // Regression test: verify super-signatures of super-invoked methods of a | |
| // mixin against the superclass, not signatures in the mixin. | |
| class A<T> { | |
| void remove(T x) {} | |
| } | |
| mixin M<U> on A<U> { | |
| void remove(Object? x) { | |
| super.remove(x as U); | |
| } | |
| } | |
| class X<T> = A<T> with M<T>; | |
| main() {} |