diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug677066-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug677066-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+function f0(p0) {
+    var v0;
+    if (v0)
+        v0 = p0;
+    return v0;
+}
+assertEq(f0(0), undefined);