| /* |
| * Copyright (c) 2019, 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 In a legacy library, none of the new syntax introduced by this |
| * proposal is available, and it is a static error if it is used. |
| * |
| * @description Check that Never is allowed in pre-NNBD legacy library (see |
| * https://github.com/dart-lang/co19/issues/548) |
| * @author sgrekhov@unipro.ru |
| */ |
| // @dart=2.6 |
| // SharedOptions=--enable-experiment=non-nullable |
| // Requirements=nnbd-weak |
| |
| class A {} |
| |
| main() { |
| if (A is Never) { |
| } |
| } |
