| // 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 | 
 |  | 
 | // The following compile-time error is expected: | 
 | // | 
 | // Error: 'D' can't implement both '#lib1::B<#lib1::D::X, #lib1::D::Y>' and | 
 | // '#lib1::B<#lib1::D::X, #lib1::A>' | 
 | // class D<X, Y> extends B<X, Y> with C<X> {} | 
 | //       ~ | 
 |  | 
 | class A {} | 
 |  | 
 | class B<X, Y> {} | 
 |  | 
 | mixin C<X> on B<X, A> {} | 
 |  | 
 | class /*@compile-error=unspecified*/ D<X, Y> extends B<X, Y> with C {} | 
 |  | 
 | main() {} |