/*
 * Copyright (c) 2019, 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. Test type aliases
 * @compile-error
 * @author sgrekhov@unipro.ru
 */
// SharedOptions=--enable-experiment=nonfunction-type-aliases

abstract class C implements A {}
abstract class B implements C {}

typedef BAlias = B;

abstract class A implements BAlias {}

class D implements A {}

main() {
  try {
    new D();
  } catch (e) {}
}