// Copyright (c) 2018, 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.

import 'dart:async';

/* `return;` is an error if `T` is not `void`, `dynamic`, or `Null`.
 */

Future<int>? test() {
  return;
//^
// [analyzer] unspecified
// [cfe] unspecified
}

void main() {
  test();
}