pkg/front_end/testcases/nonfunction_type_aliases/issue45491.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 extends A<X>> {}

typedef AAlias<X> = A;

void main() {}