pkg/front_end/testcases/general/issue45490.dart

// 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.

class A<X> {}

class test<X extends A> = A<X extends A<X>>;

main() {}