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diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/overflow/char/3599.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/overflow/char/3599.cc
new file mode 100644
index 00000000..b9d86a6e
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/overflow/char/3599.cc
@@ -0,0 +1,58 @@
+// 1999-10-11 bkoz
+
+// Copyright (C) 1999, 2000, 2001, 2002, 2003, 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 <ostream>
+#include <testsuite_hooks.h>
+
+// libstdc++/3599
+class testbuf : public std::stringbuf
+{
+public:
+  typedef std::stringbuf::traits_type traits_type;
+
+  testbuf() : std::stringbuf() { }
+ 
+protected:
+  int_type 
+  overflow(int_type c __attribute__((unused)) = traits_type::eof()) 
+  { return traits_type::not_eof(0); }
+};
+
+void
+test07()
+{
+  bool test __attribute__((unused)) = true;
+  testbuf ob;
+  std::ostream out(&ob); 
+
+  out << "gasp";
+  VERIFY(out.good());
+
+  out << std::endl;
+  VERIFY(out.good());
+}
+
+int main() 
+{
+  test07();
+  return 0;
+}