// 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 spread element in a list or set literal has a static type that is not
/// dynamic and not a subtype of Iterable<Object>.
/// @description Checks that compile error is thrown if null-aware spread element
/// in the constant set is not dynamic and is not assignable to [Iterable] or
/// [Null]
/// @author iarkh@unipro.ru


main() {
  const x1 = {1: 1};
  const x2 = 100;
  const x3 = "check";

  const Set s1 = {...?x1}; //# 01: compile-time error
  const Set s2 = {...?x2}; //# 02: compile-time error
  const Set s3 = {...?x3}; //# 03: compile-time error
}