text: // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
  
  // Copyright (C) 2001-2017 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/>.
  
  // 27.8.1.4 Overridden virtual functions
  
  #include <sstream>
  #include <testsuite_hooks.h>
  
  // libstdc++/9439, libstdc++/9425
  // basic_filebuf<>::pbackfail calls basic_filebuf<>::seekoff, but
  // fails to check the return value
  void test09()
  {
    using namespace std;
  
    stringbuf sbuf;
    stringbuf::int_type r = sbuf.sputbackc('a');
    VERIFY( r == stringbuf::traits_type::eof() );
  }
  
  int main() 
  {
    test09();
    return 0;
  }
  