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diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/3.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/3.cc
new file mode 100644
index 00000000..435ebcc3
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/3.cc
@@ -0,0 +1,51 @@
+// 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
+// .
+
+// 27.8.1.4 Overridden virtual functions
+
+#include
+#include
+
+void test03()
+{
+ using namespace std;
+ bool test __attribute__((unused)) = true;
+
+ const char* name = "tmp_seekoff_3";
+
+ wfilebuf fb;
+
+ fb.open(name, ios_base::out);
+ fb.sputc(0xf001);
+
+ try
+ {
+ // seekoff should flush the output sequence, which will fail
+ // if the output buffer contains illegal characters.
+ fb.pubseekoff(0, ios_base::cur);
+ VERIFY( false );
+ }
+ catch (std::exception&)
+ {
+ }
+}
+
+int main()
+{
+ test03();
+ return 0;
+}