// 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 It is a compile-time error if:
/// A non-null-aware spread element has static type Null.
/// @description Checks that compile error is thrown if spread element is
/// statically [Null].
/// @description Check that trying to use [null] element as a null-aware spread
/// element does not cause compile error
/// @author iarkh@unipro.ru


Null n = null;

main() {
  var res1 = [...?n];
  Map res2 = {...?n};
  Set res3 = {...?n};

  var res4 = <int>[...?n];
  var res5 = <int>{...?n};
  var res6 = <int, int>{...?n};
}