diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug613151.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug613151.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+// Iterating over a property with an Array id.
+function n() {}
+function g() {}
+eval("\
+  function a() {}\
+  function b() {\
+    for (w in this) {}\
+    Object.defineProperty(\
+      this, \
+      new Array, \
+      ({enumerable: true})\
+    )\
+  }\
+  for (z in [0, 0, 0]) b()\
+")
+
+// Test it doesn't assert.
+