diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/pic/bug645184.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/pic/bug645184.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+var obj = new Object();
+var passed = true;
+for (var i = 0; i < 100; i++) {
+    if (obj['-1'] == null)
+        obj['-1'] = new Array();
+    assertEq(obj['-1'] == null, false);
+    obj = new Object();
+}