| /* |
| * Copyright (c) 2020, 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. |
| */ |
| /** |
| * @assertion Duration difference(DateTime other) |
| * Throws [Error] if [other] is [:null:]. |
| * @description Checks that compile error appears if [other] is statically |
| * [null]. |
| * @author iarkh |
| */ |
| |
| main() { |
| DateTime.now().difference(null); |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
