diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug938431.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug938431.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+if (typeof ParallelArray === "undefined")
+  quit();
+
+function x() {}
+ParallelArray(3385, function(y) {
+    Object.defineProperty([], 8, {
+        e: (y ? x : Math.fround(1))
+    })
+})