| // 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. |
| |
| // @dart = 2.9 |
| |
| class I<X, Y> {} |
| |
| mixin M0<T> implements I<T, List<T>> {} |
| |
| mixin M1<T> implements I<List<T>, T> {} |
| |
| ////////////////////////////////////////////////////// |
| // Inference does not produce infinite types |
| /////////////////////////////////////////////////////// |
| |
| // No solution, even with unification, since solution |
| // requires that I<List<U0>, U0> == I<U1, List<U1>> |
| // for some U0, U1, and hence that: |
| // U0 = List<U1> |
| // U1 = List<U0> |
| // which has no finite solution |
| class A with M0, M1 {} /*@compile-error=unspecified*/ |
| |
| void main() {} |
