dart-sdk/tests/language/const_constructor_mixin2_test.dart

// 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.

class Mixin {
  var nonFinalField;
}

class A {
  const A(foo);
}

class B extends A 
    with Mixin  /// 01: compile-time error
    {
  const B(foo) : super(foo);
}

main() {
  var a = const B(42);
  a.nonFinalField = 54; /// 01: continued
}