diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug905989.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug905989.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+if (typeof ParallelArray === "undefined")
+  quit();
+
+function TestCase(n, d, e, a) {};
+function reportCompare() {
+  new TestCase();
+}
+reportCompare();
+TestCase = ParallelArray;
+try {
+  reportCompare();
+} catch(exc1) {}
+reportCompare();