diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug995673.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug995673.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+var total = 0
+
+x = [ [] ]
+x[0].valueOf = function () {
+  total++;
+}
+function f(y) {
+    y != Math.abs()
+}
+(function() {
+    f()
+    f(x[0])
+    f(x[0])
+})()
+
+assertEq(total, 2)