--- /dev/null
+// { 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_remove_unsigned()
+ {
+ typedef typename __gnu_cxx::__remove_unsigned<T>::__type signed_type;
+ }
+
+int main()
+{
+ check_remove_unsigned<bool>(); // { dg-error "instantiated from" }
+ check_remove_unsigned<wchar_t>(); // { dg-error "instantiated from" }
+ return 0;
+}
+
+// { dg-error "invalid use of incomplete" "" { target *-*-* } 28 }
+// { dg-error "declaration of" "" { target *-*-* } 105 }