diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug989586.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug989586.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+function t() {
+    var iter = 0;
+    function a(w) {
+	var a = new Array(w);
+	assertEq(a.length, w);
+    }
+    function r() {
+	a(3);
+	a(4);
+    }
+    for (var i=0; i<100; i++) {
+	r();
+    }
+}
+t();