obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
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if you have obtained the source via the command 'git clone',
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1 files changed, 129 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/tr1/6_containers/unordered_multiset/erase/1.cc b/libstdc++-v3/testsuite/tr1/6_containers/unordered_multiset/erase/1.cc
new file mode 100644
index 000000000..5f7ec8930
--- /dev/null
+++ b/libstdc++-v3/testsuite/tr1/6_containers/unordered_multiset/erase/1.cc
@@ -0,0 +1,129 @@
+// 2007-02-22  Paolo Carlini  <pcarlini@suse.de> 
+//
+// Copyright (C) 2007, 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/>.
+
+// 6.3.4.5  Class template unordered_multiset
+
+#include <tr1/unordered_set>
+#include <string>
+#include <testsuite_hooks.h>
+
+// In the occasion of libstdc++/25896
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  
+  typedef std::tr1::unordered_multiset<std::string> Mset;
+  typedef Mset::iterator       iterator;
+  typedef Mset::const_iterator const_iterator;
+
+  Mset ms1;
+  
+  ms1.insert("because to why");
+  ms1.insert("the stockholm syndrome");
+  ms1.insert("a cereous night");
+  ms1.insert("eeilo");
+  ms1.insert("protean");
+  ms1.insert("the way you are when");
+  ms1.insert("tillsammans");
+  ms1.insert("umbra/penumbra");
+  ms1.insert("belonging (no longer mix)");
+  ms1.insert("one line behind");
+  VERIFY( ms1.size() == 10 );
+
+  VERIFY( ms1.erase("eeilo") == 1 );
+  VERIFY( ms1.size() == 9 );
+  iterator it1 = ms1.find("eeilo");
+  VERIFY( it1 == ms1.end() );
+
+  VERIFY( ms1.erase("tillsammans") == 1 );
+  VERIFY( ms1.size() == 8 );
+  iterator it2 = ms1.find("tillsammans");
+  VERIFY( it2 == ms1.end() );
+
+  // Must work (see DR 526)
+  iterator it3 = ms1.find("belonging (no longer mix)");
+  VERIFY( it3 != ms1.end() );
+  VERIFY( ms1.erase(*it3) == 1 );
+  VERIFY( ms1.size() == 7 );
+  it3 = ms1.find("belonging (no longer mix)");
+  VERIFY( it3 == ms1.end() );
+
+  VERIFY( !ms1.erase("abra") );
+  VERIFY( ms1.size() == 7 );
+
+  VERIFY( !ms1.erase("eeilo") );
+  VERIFY( ms1.size() == 7 );
+
+  VERIFY( ms1.erase("because to why") == 1 );
+  VERIFY( ms1.size() == 6 );
+  iterator it4 = ms1.find("because to why");
+  VERIFY( it4 == ms1.end() );
+
+  iterator it5 = ms1.find("umbra/penumbra");
+  iterator it6 = ms1.find("one line behind");
+  VERIFY( it5 != ms1.end() );
+  VERIFY( it6 != ms1.end() );
+
+  VERIFY( ms1.find("the stockholm syndrome") != ms1.end() );
+  VERIFY( ms1.find("a cereous night") != ms1.end() );
+  VERIFY( ms1.find("the way you are when") != ms1.end() );
+  VERIFY( ms1.find("a cereous night") != ms1.end() );
+
+  VERIFY( ms1.erase(*it5) == 1 );
+  VERIFY( ms1.size() == 5 );
+  it5 = ms1.find("umbra/penumbra");
+  VERIFY( it5 == ms1.end() );
+
+  VERIFY( ms1.erase(*it6) == 1 );
+  VERIFY( ms1.size() == 4 );
+  it6 = ms1.find("one line behind");
+  VERIFY( it6 == ms1.end() );
+
+  iterator it7 = ms1.begin();
+  iterator it8 = it7;
+  ++it8;
+  iterator it9 = it8;
+  ++it9;
+
+  VERIFY( ms1.erase(*it8) == 1 );
+  VERIFY( ms1.size() == 3 );
+  VERIFY( ++it7 == it9 );
+
+  iterator it10 = it9;
+  ++it10;
+  iterator it11 = it10;
+
+  VERIFY( ms1.erase(*it9) == 1 );
+  VERIFY( ms1.size() == 2 );
+  VERIFY( ++it10 == ms1.end() );
+
+  VERIFY( ms1.erase(ms1.begin()) != ms1.end() );  
+  VERIFY( ms1.size() == 1 );
+  VERIFY( ms1.begin() == it11 );
+
+  VERIFY( ms1.erase(*ms1.begin()) == 1 );  
+  VERIFY( ms1.size() == 0 );
+  VERIFY( ms1.begin() == ms1.end() );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}