Index: include/bits/list.tcc
===================================================================
--- include/bits/list.tcc	(revision 155172)
+++ include/bits/list.tcc	(working copy)
@@ -312,13 +312,13 @@
 
         do
 	  {
-	    __carry.splice(__carry.begin(), *this, begin());
+	    __carry.splice(__carry.begin(), _GLIBCXX_MOVE(*this), begin());
 
 	    for(__counter = &__tmp[0];
 		__counter != __fill && !__counter->empty();
 		++__counter)
 	      {
-		__counter->merge(__carry);
+		__counter->merge(_GLIBCXX_MOVE(__carry));
 		__carry.swap(*__counter);
 	      }
 	    __carry.swap(*__counter);
@@ -328,7 +328,7 @@
 	while ( !empty() );
 
         for (__counter = &__tmp[1]; __counter != __fill; ++__counter)
-          __counter->merge(*(__counter - 1));
+          __counter->merge(_GLIBCXX_MOVE(*(__counter - 1)));
         swap( *(__fill - 1) );
       }
     }
@@ -389,13 +389,13 @@
 
 	    do
 	      {
-		__carry.splice(__carry.begin(), *this, begin());
+		__carry.splice(__carry.begin(), _GLIBCXX_MOVE(*this), begin());
 
 		for(__counter = &__tmp[0];
 		    __counter != __fill && !__counter->empty();
 		    ++__counter)
 		  {
-		    __counter->merge(__carry, __comp);
+		    __counter->merge(_GLIBCXX_MOVE(__carry), __comp);
 		    __carry.swap(*__counter);
 		  }
 		__carry.swap(*__counter);
@@ -405,7 +405,7 @@
 	    while ( !empty() );
 
 	    for (__counter = &__tmp[1]; __counter != __fill; ++__counter)
-	      __counter->merge(*(__counter - 1), __comp);
+	      __counter->merge(_GLIBCXX_MOVE(*(__counter - 1)), __comp);
 	    swap(*(__fill - 1));
 	  }
       }
Index: testsuite/23_containers/list/operations/42352.cc
===================================================================
--- testsuite/23_containers/list/operations/42352.cc	(revision 0)
+++ testsuite/23_containers/list/operations/42352.cc	(revision 0)
@@ -0,0 +1,66 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 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 Pred 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 <list>
+#include <testsuite_hooks.h>
+
+// PR libstdc++/42352
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::list<int> l{3, 2, 4, 1, 5, 9, 0, 8, 6, 7};
+
+  l.sort();
+
+  for (auto it = l.begin(); it != l.end(); ++it)
+    {
+      static int nn = 0;
+      VERIFY( *it == nn++ );
+    }
+}
+
+void test02()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::list<int> l{3, 2, 4, 1, 5, 9, 0, 8, 6, 7};
+
+  struct compare
+  {
+    bool
+    operator()(int const& one, int const& two) const
+    { return one > two; }
+  };
+
+  l.sort(compare());
+
+  for (auto it = l.begin(); it != l.end(); ++it)
+    {
+      static int nn = 9;
+      VERIFY( *it == nn-- );
+    }
+}
+
+int main()
+{
+  test01();
+  test02();
+  return 0;
+}