--- /dev/null
+// 2004-09-30 Paolo Carlini <pcarlini@suse.de>
+
+// Copyright (C) 2004, 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/>.
+
+// 27.7.1.3 Overridden virtual functions
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/10975
+void test01()
+{
+ bool test __attribute__((unused)) = true;
+ using namespace std;
+ typedef streambuf::pos_type pos_type;
+ typedef streambuf::off_type off_type;
+
+ const pos_type good = pos_type(off_type(0));
+ const pos_type bad = pos_type(off_type(-1));
+ pos_type p;
+
+ stringbuf sbuf;
+
+ p = sbuf.pubseekoff(0, ios_base::cur, ios_base::in);
+ VERIFY( p == good );
+
+ p = sbuf.pubseekoff(0, ios_base::beg, ios_base::out);
+ VERIFY( p == good );
+
+ p = sbuf.pubseekoff(0, ios_base::end);
+ VERIFY( p == good );
+
+ p = sbuf.pubseekoff(0, ios_base::cur);
+ VERIFY( p == bad );
+}
+
+int main()
+{
+ test01();
+ return 0;
+}