diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug756851.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug756851.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+o0 = {};
+g = new ArrayBuffer;
+g2 = this;
+v = g2.o0.t;
+o0 = Object;
+var y = {
+  x: gc(gcPreserveCode())
+}
+y.toString();
+for (z = 0; z < 100; z++) {}