// Copyright (c) 2020, 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.

main() async {
  bool b = (() => true)();
  (_) {
    if (b) return 42;
  };
  (_) async {
    if (b) return 42;
  };
}
