diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 31bf711d7e5..f550f8fe109 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2011-10-13  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR libstdc++/50714
+	* include/bits/codecvt.h (codecvt<>::codecvt(size_t)): Initialize
+	_M_c_locale_codecvt member.
+	* testsuite/22_locale/codecvt_byname/50714.cc: New.
+
 2011-10-12  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/50594
diff --git a/libstdc++-v3/include/bits/codecvt.h b/libstdc++-v3/include/bits/codecvt.h
index 2570f4c6104..f485c170dea 100644
--- a/libstdc++-v3/include/bits/codecvt.h
+++ b/libstdc++-v3/include/bits/codecvt.h
@@ -292,7 +292,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
       explicit
       codecvt(size_t __refs = 0)
-      : __codecvt_abstract_base<_InternT, _ExternT, _StateT> (__refs) { }
+      : __codecvt_abstract_base<_InternT, _ExternT, _StateT> (__refs),
+	_M_c_locale_codecvt(0)
+      { }
 
       explicit
       codecvt(__c_locale __cloc, size_t __refs = 0);
diff --git a/libstdc++-v3/testsuite/22_locale/codecvt_byname/50714.cc b/libstdc++-v3/testsuite/22_locale/codecvt_byname/50714.cc
new file mode 100644
index 00000000000..6c84be2bd59
--- /dev/null
+++ b/libstdc++-v3/testsuite/22_locale/codecvt_byname/50714.cc
@@ -0,0 +1,94 @@
+// { dg-require-namedlocale "de_DE" }
+
+// Copyright (C) 2011 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/>.
+
+#include <locale>
+
+#define mychar unsigned short
+
+namespace std
+{
+  template<> codecvt<mychar, char, mbstate_t>::~codecvt()
+  { }
+
+  template<>
+  codecvt<mychar, char, mbstate_t>::result
+  codecvt<mychar, char, mbstate_t>::
+  do_out(state_type&, const intern_type*, const intern_type*,
+	 const intern_type*&, extern_type*, extern_type*,
+	 extern_type*&) const
+  { return codecvt_base::ok; }
+
+  template<>
+  codecvt<mychar, char, mbstate_t>::result
+  codecvt<mychar, char, mbstate_t>::
+  do_in(state_type&, const extern_type*, const extern_type*,
+	const extern_type*&, intern_type*, intern_type*,
+	intern_type*&) const
+  { return codecvt_base::ok; }
+
+  template<>
+  codecvt<mychar, char, mbstate_t>::result
+  codecvt<mychar, char, mbstate_t>::
+  do_unshift(state_type&, extern_type*, extern_type*,
+	     extern_type*&) const
+  { return noconv; }
+
+  template<>
+  int
+  codecvt<mychar, char, mbstate_t>::do_encoding() const
+  { return 0; }
+
+  template<>
+  bool
+  codecvt<mychar, char, mbstate_t>::do_always_noconv() const
+  { return false; }
+
+  template<>
+  int
+  codecvt<mychar, char, mbstate_t>::
+  do_length(state_type&, const extern_type*, const extern_type*,
+	    size_t) const
+  { return 0; }
+
+  template<>
+  int
+  codecvt<mychar, char, mbstate_t>::do_max_length() const
+  { return 4; }
+}
+
+// libstdc++/50714
+void test01()
+{
+  using namespace std;
+
+  {
+    locale loc(locale::classic(),
+	       new codecvt<mychar, char, mbstate_t>());
+  }
+  {
+    locale loc2(locale::classic(),
+		new codecvt_byname<mychar, char, mbstate_t>("de_DE"));
+  }
+}
+
+int main()
+{
+  test01();
+  return 0;
+}