// Copyright (C) 2008-2021 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/>.

// NB: This issue affected only debug-mode.

// { dg-do compile }

// libstdc++/35541

#include <set>
#include <iterator>
#include <algorithm>

void test01()
{
  std::set<std::pair<unsigned,int> > mFactors;
  std::set<std::pair<unsigned,int> > secondFactor;
  std::set_difference(mFactors.begin(), mFactors.end(),
		      mFactors.begin(), mFactors.end(),
		      std::insert_iterator<std::set<std::pair<unsigned,int> > >
		      (secondFactor, secondFactor.end())); 
}