| // 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. |
| |
| // @dart = 2.9 |
| |
| import 'dart:async'; |
| |
| /* |
| * `return exp;` where `exp` has static type `S` is an error if `flatten(S)` is |
| `void` and `flatten(T)` is not `void`, `dynamic`, or `Null`. |
| */ |
| Future<void> v = null; |
| FutureOr<Object> test() async { |
| return /*@compile-error=unspecified*/ v; |
| } |
| |
| void main() { |
| test(); |
| } |