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// 2003-02-06  Paolo Carlini  <pcarlini@unitus.it>

// Copyright (C) 2003, 2005, 2009 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library 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, or (at your option)

// any later version.

// This library 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 library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

// 27.6.2.3 class basic_ostream::sentry

#include <ostream>

#include <sstream>

#include <testsuite_hooks.h>

// libstdc++/9563

struct buf : std::streambuf

{

  std::ios *io_;

  buf(std::ios *io)

  : io_(io) { }

  virtual int

  sync()

  {

    io_->setstate (std::ios::failbit);

    return 0;

  }

};

void

test02()

{

  bool test __attribute__((unused)) = true;

  buf b(0);

  std::ostream strm(&b);

  buf tb(&strm);

  std::ostream tied(&tb);

  strm.tie(&tied);

  std::ostream::sentry s(strm);

  VERIFY( !s );

}

int main()

{

  test02();

  return 0;

}