--- /dev/null
+// 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/>.
+
+
+// 27.5.2 template class basic_streambuf
+
+#include <cwchar>
+#include <streambuf>
+#include <sstream>
+#include <ostream>
+#include <testsuite_hooks.h>
+
+// libstdc++/9424
+class Outbuf_2 : public std::wstreambuf
+{
+ wchar_t buf[1];
+
+public:
+ Outbuf_2()
+ {
+ setp(buf, buf + 1);
+ }
+
+ int_type overflow(int_type c)
+ {
+ int_type eof = traits_type::eof();
+
+ if (pptr() < epptr())
+ {
+ if (traits_type::eq_int_type(c, eof))
+ return traits_type::not_eof(c);
+
+ *pptr() = traits_type::to_char_type(c);
+ pbump(1);
+ return c;
+ }
+
+ return eof;
+ }
+};
+
+class Inbuf_2 : public std::wstreambuf
+{
+ static const wchar_t buf[];
+ const wchar_t* current;
+ int size;
+
+public:
+ Inbuf_2()
+ {
+ current = buf;
+ size = std::wcslen(buf);
+ }
+
+ int_type underflow()
+ {
+ if (current < buf + size)
+ return traits_type::to_int_type(*current);
+ return traits_type::eof();
+ }
+
+ int_type uflow()
+ {
+ if (current < buf + size)
+ return traits_type::to_int_type(*current++);
+ return traits_type::eof();
+ }
+};
+
+const wchar_t Inbuf_2::buf[] = L"Atteivlis";
+
+void test12()
+{
+ bool test __attribute__((unused)) = true;
+
+ Outbuf_2 outbuf2;
+ std::wostream os (&outbuf2);
+ Inbuf_2 inbuf2;
+ os << &inbuf2;
+ VERIFY( inbuf2.sgetc() == L't' );
+ VERIFY( os.good() );
+}
+
+int main()
+{
+ test12();
+ return 0;
+}