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',
however, do note that line-endings of files in your working
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1 files changed, 65 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/23_containers/map/modifiers/swap/1.cc b/libstdc++-v3/testsuite/23_containers/map/modifiers/swap/1.cc
new file mode 100644
index 000000000..b5fe2e374
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/map/modifiers/swap/1.cc
@@ -0,0 +1,65 @@
+// Copyright (C) 2004, 2005, 2009 Free Software Foundation
+//
+// 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/>.
+
+#include <map>
+#include <testsuite_hooks.h>
+ 
+struct T { int i; };
+
+// T must be LessThanComparable to pass concept-checks
+bool operator<(T l, T r) { return l.i < r.i; }
+
+int swap_calls;
+
+namespace std
+{
+  template<> 
+    void 
+    map<T, int>::swap(map<T, int>&) 
+    { ++swap_calls; }
+}
+
+// Should use map specialization for swap.
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  std::map<T, int> A;
+  std::map<T, int> B;
+  swap_calls = 0;
+  std::swap(A, B);
+  VERIFY(1 == swap_calls);
+}
+
+// Should use map specialization for swap.
+void test02()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+  map<T, int> A;
+  map<T, int> B;
+  swap_calls = 0;
+  swap(A, B);
+  VERIFY(1 == swap_calls);
+}
+
+// See c++/13658 for background info.
+int main()
+{
+  test01();
+  test02();
+  return 0;
+}