diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug616170.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug616170.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+/* Don't trip bogus assert. */
+
+function e()
+{
+    try
+    {
+        var t = undefined;
+    }
+    catch (e)
+    {
+        var t = null;
+    }
+    while (t && (t.tagName.toUpperCase() != "BODY"))
+        continue;
+}
+for (var i = 0; i < 20; i++)
+  e();