|  | // 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 I<X> {} | 
|  |  | 
|  | mixin class M0<T> extends Object implements I<T> {} | 
|  |  | 
|  | mixin M1<T> on I<T> {} | 
|  |  | 
|  | // M0 is inferred as M0<dynamic> (unconstrained) | 
|  | // M1 is inferred as M1<dynamic> (constrained by inferred argument to M0) | 
|  | // Error since class hierarchy is inconsistent | 
|  | class A extends Object with M0, M1 implements I<int> {} | 
|  |  | 
|  | main() {} |