// 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.

class C {
  final Set<int> s;
  C(List<int> ell) : s = {for (var e in ell) if (e.isOdd) 2 * e};
}

main() {}