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diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/sbumpc/wchar_t/9825.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/sbumpc/wchar_t/9825.cc
new file mode 100644
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--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/sbumpc/wchar_t/9825.cc
@@ -0,0 +1,49 @@
+// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
+
+// Copyright (C) 2001, 2002, 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/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/9825
+// filebuf::sputbackc breaks sbumpc
+void test12()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  wstringbuf sbuf;
+  sbuf.sputn(L"crazy bees!", 11);
+  sbuf.pubseekoff(0, ios_base::beg);
+  sbuf.sbumpc();
+  sbuf.sputbackc(L'x');
+  stringbuf::int_type c = sbuf.sbumpc();
+  VERIFY( c == L'x' );
+  c = sbuf.sbumpc();
+  VERIFY( c == L'r' );
+  c = sbuf.sbumpc();
+  VERIFY( c == L'a' );
+}
+
+int main() 
+{
+  test12();
+  return 0;
+}