| // 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 exp;` where `exp` has static type `S` is an error if the future |
| * value type of the function is neither `void` nor `dynamic`, |
| * and `flatten(S)` is `void` or `void*`. |
| * |
| * With null-safety, this is an error because of the downcast and the use of |
| * an expression of type `void`. |
| */ |
| |
| void v = null; |
| |
| FutureOr<int> test() async { |
| return v; |
| // ^ |
| // [analyzer] COMPILE_TIME_ERROR.RETURN_OF_INVALID_TYPE |
| // [cfe] A value of type 'void' can't be returned from an async function with return type 'FutureOr<int>'. |
| } |
| |
| void main() { |
| test(); |
| } |