diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug713209.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug713209.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+// Binary: cache/js-dbg-32-c5b90ea7e475-linux
+// Flags: -m -n -a
+//
+
+var save__proto__ = __proto__;
+__proto__ = save__proto__;
+function bar(x, y) {
+  return x + y;
+}
+function foo(x, y) {
+  var a = 0;
+  for (var i = 0; i < 1000; i++) {
+    a += (this.toString);
+    a += bar(x, y);
+    a = bar(x, (a));
+    a += bar(x, y);
+  }
+  return a;
+}
+var q = foo(0, 1);
+print(q.toSource());