diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-624547.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-624547.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+function f(x) {
+    delete arguments[0];
+    for(var i=0; i<20; i++) {
+        arguments[0] !== undefined;
+    }
+}
+
+/* Don't crash. */
+f(1);
+
+reportCompare(0, 0, "ok");