diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index ed0aeeb6d44e970b85c14b308ed83b9c60c55a8a..b75e38ac22d6560f0cc67d41944accde9849ae40 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2009-12-22  Jason Merrill  <jason@redhat.com>
+
+	PR c++/42331
+	* typeck.c (cp_build_modify_expr): Fix thinko.
+
 2009-12-21  Jason Merrill  <jason@redhat.com>
 
 	* mangle.c (write_member_name): Move abi-version=1 code back to...
diff --git a/gcc/cp/typeck.c b/gcc/cp/typeck.c
index 402f9e4ce819c3b860648cc6fe7489d4aa080cd7..f17d9c52519e2f23ad4150749f86f60e7331d71b 100644
--- a/gcc/cp/typeck.c
+++ b/gcc/cp/typeck.c
@@ -6455,15 +6455,15 @@ cp_build_modify_expr (tree lhs, enum tree_code modifycode, tree rhs,
     {
       int from_array;
 
-      if (BRACE_ENCLOSED_INITIALIZER_P (rhs))
+      if (BRACE_ENCLOSED_INITIALIZER_P (newrhs))
 	{
-	  if (check_array_initializer (lhs, lhstype, rhs))
+	  if (check_array_initializer (lhs, lhstype, newrhs))
 	    return error_mark_node;
-	  rhs = digest_init (lhstype, rhs);
+	  newrhs = digest_init (lhstype, newrhs);
 	}
 
       else if (!same_or_base_type_p (TYPE_MAIN_VARIANT (lhstype),
-				     TYPE_MAIN_VARIANT (TREE_TYPE (rhs))))
+				     TYPE_MAIN_VARIANT (TREE_TYPE (newrhs))))
 	{
 	  if (complain & tf_error)
 	    error ("incompatible types in assignment of %qT to %qT",
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9cf74ee59c222062da7303066ad6a709cb05adf2..cfd4b5ecf1e77baf4178f64444991af32b776ddb 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2009-12-22  Jason Merrill  <jason@redhat.com>
+
+	PR c++/42331
+	* g++.dg/cpp0x/initlist29.C: New.
+
 2009-12-22  Iain Sandoe  <iain.sandoe@sandoe-acoustics.co.uk>
 
 	PR target/41605
diff --git a/gcc/testsuite/g++.dg/cpp0x/initlist29.C b/gcc/testsuite/g++.dg/cpp0x/initlist29.C
new file mode 100644
index 0000000000000000000000000000000000000000..1568678e0d02e824c651a8f676b0ac941129bb07
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/initlist29.C
@@ -0,0 +1,14 @@
+// PR c++/42331
+// { dg-options "-std=c++0x" }
+
+class Mesh
+{
+public:
+  Mesh(const char*)
+  { typele={0}; }		// { dg-error "" }
+
+private:
+  int typele[7][2];
+};
+
+Mesh m(0);