diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug916712.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug916712.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+var e = new Error();
+function test() {
+  var arr = new Float32Array(1);
+  for (var Number in e) {}
+  var a = arr [0];
+  switch (a) {}
+} test();