// Copyright (c) 2011, 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.

/// @assertion Iff no constructor is specified for a class C, it implicitly has
/// a default constructor C() : super() {}, unless C is class Object.
/// @description Checks that 'default' constructor is not generated if the class
/// declares a named constructor.
/// @author iefremov


class C {
  var x;
  C.someConstructor(this.x);
}

main() {
  new C();
//    ^
// [analyzer] unspecified
// [cfe] unspecified
}
