// Copyright (c) 2013, 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

class Mixin {}

class A {
  const A(foo);
}

class B extends A with Mixin {
  const B(foo) : super(foo);
}

main() {
  var a = const B(42);
}