diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug930993.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug930993.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+x = {};
+y = x;
+x.toString = function() {
+    new Int8Array(ArrayBuffer)[0] = new Float32Array(ArrayBuffer)[0];
+}
+print(x << y);