pkg/front_end/testcases/regress/issue_29981.dart

// Copyright (c) 2017, 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 C<T> {
  C<String, String> field;
}

main() {
  print(new C());
}