--- /dev/null
+// { dg-require-namedlocale "" }
+
+// Copyright (C) 2003, 2005, 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 <iostream>
+#include <locale>
+#include <testsuite_hooks.h>
+
+// libstdc++/13171
+void test01()
+{
+ bool test __attribute__((unused)) = true;
+ using namespace std;
+
+ locale::global(locale("fr_FR"));
+
+ ios_base::sync_with_stdio(false);
+
+ locale::global(locale("en_US"));
+ cin.imbue(locale("en_US"));
+ cout.imbue(locale("en_US"));
+ cerr.imbue(locale("en_US"));
+ clog.imbue(locale("de_DE"));
+ wcin.imbue(locale("en_US"));
+ wcout.imbue(locale("en_US"));
+ wcerr.imbue(locale("en_US"));
+ wclog.imbue(locale("de_DE"));
+
+ cout << 'f' << endl;
+ cerr << 'r' << endl;
+ clog << 'A' << endl;
+ wcout << L's' << endl;
+ wcerr << L'i' << endl;
+ wclog << L'L' << endl;
+}
+
+int main()
+{
+ test01();
+}