diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/gc/bug-906243.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/gc/bug-906243.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+a2 = []
+g = function() r
+Object.defineProperty(a2, 0, {
+    set: function() {}
+})
+for (var x = 0; x < 70; ++x) {
+    Array.prototype.unshift.call(a2, g)
+}
+a2.length = 8
+for each(e in [0, 0]) {
+    Array.prototype.shift.call(a2)
+}