--- /dev/null
+// { dg-require-namedlocale "" }
+
+// 2003-03-12 Petur Runolfsson <peturr02@ru.is>
+
+// 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/>.
+
+
+// 22.2.1.3.2 ctype<wchar_t> members
+
+#include <locale>
+#include <testsuite_hooks.h>
+
+// libstdc++/9870
+void test02()
+{
+ using namespace std;
+ bool test __attribute__((unused)) = true;
+
+ locale loc = locale("en_US.ISO-8859-1");
+ const ctype<wchar_t>& wct = use_facet<ctype<wchar_t> >(loc);
+
+ char c = 0xff;
+ wchar_t wc = wct.widen(c);
+
+ VERIFY( wc == static_cast<wchar_t>(0xff) );
+}
+
+int main()
+{
+ test02();
+ return 0;
+}