/* Copyright 2012-2021 Free Software Foundation, Inc.
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <iostream>
using namespace std;

class c1;

void foo ();

int
main ()
{
  foo ();
  return 0;
}

void
foo ()
{
  c1 *p = 0;
}

class b1 { public: int x; };

class c1 : public b1
{
 public:
  using b1::x;
  c1 () {}
};