diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug911369.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug911369.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+var a = [];
+var count = 0;
+a.valueOf = function() {
+    ++count;
+}
+function f(a) {
+    6 - a;
+}
+
+f(3);
+for (var i=0; i<10; i++)
+    f(a);
+
+assertEq(count, 10);