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diff --git a/libstdc++-v3/testsuite/23_containers/map/pthread6.cc b/libstdc++-v3/testsuite/23_containers/map/pthread6.cc
new file mode 100644
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+++ b/libstdc++-v3/testsuite/23_containers/map/pthread6.cc
@@ -0,0 +1,87 @@
+// 2002-01-23  Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
+// Adpated from libstdc++/5444 submitted by markus.breuer@materna.de
+//
+// Copyright (C) 2002, 2003, 2004, 2005, 2006, 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/>.
+
+// { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* mips-sgi-irix6* } }
+// { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* mips-sgi-irix6* } }
+// { dg-options "-pthreads" { target *-*-solaris* } }
+
+#include <string>
+#include <map>
+#include <vector>
+#include <pthread.h>
+
+const int max_thread_count = 8;
+const int loops = 100000;
+
+const char* my_default = "Hallo Welt!";
+
+const std::size_t upper_limit = 2500;
+const std::size_t lower_limit = 1000;
+
+typedef char charT;
+
+typedef std::string String;
+
+typedef String MyType;
+
+void*
+thread_main (void*)
+{
+  typedef std::map<unsigned int,MyType> Map;
+  typedef Map::value_type Value_Pair;
+  Map myMap;
+
+  for (int loop = 0; loop < loops; loop++)
+    {
+      String& str = myMap[loop];
+      str.append (my_default);
+      myMap.insert (Value_Pair (loop, str));
+      
+      if (myMap.size () > upper_limit)
+	{
+	  while (myMap.size () > lower_limit)
+	    {
+	      Map::iterator it = myMap.begin ();
+	      myMap.erase (it);
+	    }
+	}
+    }
+
+  return 0;
+}
+
+int
+main (void)
+{
+  pthread_t tid[max_thread_count];
+
+#if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
+  pthread_setconcurrency (max_thread_count);
+#endif
+
+  for (int i = 0; i < max_thread_count; i++)
+    pthread_create (&tid[i], NULL, thread_main, 0);
+
+  for (int i = 0; i < max_thread_count; i++)
+    pthread_join (tid[i], NULL);
+
+  return 0;
+}