diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug560234.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug560234.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+function test() {
+    var a = ['x', '', '', '', '', '', '', 'x'];
+    var b = '';
+    for (var i = 0; i < a.length; i++) {
+        (function() {
+            a[i].replace(/x/, function() { return b; });
+        }());
+    }
+}
+test();  // should NOT get a ReferenceError for b on trace