| /* |
| * 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 The existing rules against self-reference prohibit a collection |
| * from spreading into itself: |
| * const list = [...list]; // Error. |
| * @description: Checks that constant set cannot spread itself |
| * @compile-error |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=constant-update-2018 |
| |
| main() { |
| const Map map = {...?map}; |
| } |
