--- /dev/null
+// 2003-05-30 Paolo Carlini <pcarlini@unitus.it>
+
+// Copyright (C) 2003, 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/>.
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+ bool test __attribute__((unused)) = true;
+ using namespace std;
+ typedef wstringbuf::pos_type pos_type;
+ typedef wstringbuf::off_type off_type;
+
+ wstringbuf strb_01(ios_base::out);
+
+ strb_01.sputn(L"broken peak", 11);
+ pos_type pt_1 = strb_01.pubseekoff(0, ios_base::end, ios_base::out);
+
+ // In general, according to 27.7.1.3,14, the below has undefined
+ // behaviour since pt_1 + off_type(1) doesn't come from a
+ // previous pubseekpos or pubseekoff. However, given v3 implementation,
+ // this was useful to expose a bug in pubseekpos checks.
+ pos_type pt_2 = strb_01.pubseekpos(pt_1 + off_type(1), ios_base::out);
+ VERIFY( pt_2 == pos_type(off_type(-1)) );
+}
+
+int main()
+{
+ test01();
+ return 0;
+}