// 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.

// @dart = 2.9

/// @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
/// @author iarkh@unipro.ru


main() {
  const Set set = {...?set};
//                     ^
// [analyzer] unspecified
// [cfe] unspecified
}