/*
 * Copyright (c) 2011, 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.
 */
/**
 * @assertion classDefinition:
 *   metadata abstract? class identifier typeParameters? (superclass mixins?)?
 * interfaces? ‘{’ (metadata classMemberDefinition)* ‘}’ |
 *   metadata abstract? class mixinApplicationClass
 * ;
 * ...
 * It is a compile-time error if the superclass of a class C is specified as a
 * superinterface of C.
 * ...
 * @description Checks that it is a compile-time error if the superclass of a
 * class C is specified as a superinterface of C.
 * @compile-error
 * @author sgrekhov@unipro.ru
 * @issue dart-lang/co19#129
 * @issue 31624
 */
class X = A with B implements A;

abstract class A {}
class B {}

main() {
  new X();
}