tests/language/void/return_future_or_void_sync_error4_test.dart

// 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';

void main() {
  test();
}

// Can only `return;` if return type is `void`, `dynamic` or `Null`.
FutureOr<void> test() {
  return; //# none: compile-time error
}