--- /dev/null
+// Copyright (C) 2008, 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/>.
+
+// 27.6.1.5 - Template class basic_iostream
+
+#include <iostream>
+
+class mystream
+: public std::iostream
+{
+public:
+ mystream () { };
+};
+
+// libstdc++/16251
+void test01()
+{
+ mystream x;
+ x.rdbuf(std::cout.rdbuf());
+ x << std::endl;
+}
+
+int main()
+{
+ test01();
+ return 0;
+}