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diff --git a/libstdc++-v3/testsuite/ext/type_traits/add_unsigned_integer_neg.cc b/libstdc++-v3/testsuite/ext/type_traits/add_unsigned_integer_neg.cc
new file mode 100644
index 00000000..cafaf39e
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/type_traits/add_unsigned_integer_neg.cc
@@ -0,0 +1,39 @@
+// { dg-do compile }
+// -*- C++ -*-
+
+// Copyright (C) 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/>.
+
+#include <ext/type_traits.h>
+#include <tr1/type_traits>
+
+template<typename T>
+  void
+  check_add_unsigned()
+  {
+    typedef typename __gnu_cxx::__add_unsigned<T>::__type unsigned_type;
+  }
+
+int main()
+{
+  check_add_unsigned<bool>();  // { dg-error "instantiated from" }
+  check_add_unsigned<wchar_t>();  // { dg-error "instantiated from" }
+  return 0;
+}
+
+// { dg-error "invalid use of incomplete" "" { target *-*-* } 28 } 
+// { dg-error "declaration of" "" { target *-*-* } 62 }