// Copyright (c) 2021, 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
/// NORM(C<T0, ..., Tn>) = C<R0, ..., Rn> where Ri is NORM(Ti)
///
/// @description Checks that NORM(C<T0, ..., Tn>) = C<R0, ..., Rn> where Ri is
/// NORM(Ti). Test X extend Never == Never
///
/// @author sgrekhov@unipro.ru

// Requirements=nnbd-weak
class A<X> {}
class B<X extends Never> implements A<C<X>> {}
class C<X> {}

class C0 extends B<Never> implements A<C<Never>> {}

main() {
  new C0();
}