diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug792166-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug792166-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+Object.defineProperty(Object.prototype, 'x', {
+    set: function() {}
+});
+var obj = {};
+for (var i = 0; i < 100 ; ++i) {
+    obj.x = 1;
+    delete obj.x;
+}