tests/language/void/return_void_async_error2_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();
}

// Testing that a block bodied async function may not return non-void Future
// values
void test() async {
  return null as Future<int>;
  //     ^^^^^^^^^^^^^^^^^^^
  // [analyzer] COMPILE_TIME_ERROR.RETURN_OF_INVALID_TYPE
  //          ^
  // [cfe] A value of type 'Future<int>' can't be returned from an async function with return type 'void'.
}