diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug520503-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug520503-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+for each(let a in [new Boolean(false)]) {}
+for (var b = 0; b < 13; ++b) {
+    if (b % 3 == 1) {
+        (function f(c) {
+            if (c <= 1) {
+                return 1;
+            }
+            return f(c - 1) + f(c - 2);
+        })(3)
+    } else {
+        (function g(d, e) {;
+            return d.length == e ? 0 : d[e] + g(d, e + 1);
+        })([false, new Boolean(true), false], 0)
+    }
+}
+
+/* Should not have crashed. */
+