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diff --git a/libstdc++-v3/testsuite/ext/stdio_filebuf/char/10063-1.cc b/libstdc++-v3/testsuite/ext/stdio_filebuf/char/10063-1.cc
new file mode 100644
index 00000000..d920683f
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/stdio_filebuf/char/10063-1.cc
@@ -0,0 +1,57 @@
+// Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
+// Free Software Foundation
+//
+// 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/>.
+
+// { dg-require-fileio "" }
+
+#include <cstdio>
+#include <fstream>
+#include <cstring>
+#include <ext/stdio_filebuf.h>
+#include <testsuite_hooks.h>
+
+void test1()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  FILE* file = fopen("tmp_10063-1", "w");
+  putc('0', file);
+  putc('1', file);
+  {
+    __gnu_cxx::stdio_filebuf<char> sbuf(file, ios_base::out);
+    sbuf.sputc('2');
+    sbuf.sputc('3');
+  }
+  putc('4', file);	
+  fclose(file);
+
+  filebuf fbuf;
+  fbuf.open("tmp_10063-1", ios_base::in);	
+  char buf[10];
+  streamsize n = fbuf.sgetn(buf, sizeof(buf));		
+  fbuf.close();
+
+  VERIFY(n == 5);
+  VERIFY(!memcmp(buf, "01234", 5)); 
+}
+
+int main()
+{
+  test1();
+  return 0;
+}