tests/language_2/void/return_future_future_or_void_sync_error0_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.

// @dart = 2.9

import 'dart:async';

void voidValue = null;

void main() {
  test();
}

// Testing that a block bodied function may not return void
Future<FutureOr<void>> test() {
  return /*@compile-error=unspecified*/ voidValue;
}