diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug821788.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug821788.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+
+var appendToActual = function(s) {
+    actual += s + ',';
+}
+gczeal(2,(3));
+actual = '';
+function loop(f) {}
+function f(j, k) {
+  var g = function(a, b, c) {}
+  for (k = 0; k < 5; ++k)
+    appendToActual(loop(g));
+}
+f(1);