// 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 An interface has a set of direct superinterfaces.
 * An interface J is a superinterface of an interface I iff either J is a
 * direct superinterface of I or J is a superinterface of a direct
 * superinterface of I.
 * @description Checks that it is a compile-time error if the chain of
 * superinterfaces forms a circular dependency.
 * @compile-error
 * @author rodionov
 */

abstract class A implements B {}
abstract class B implements A {}

class C implements B {}

main() {
  new B();
}