diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/asm.js/testBug878520.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/asm.js/testBug878520.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+function surprise(depth) {
+    arguments.callee.caller(depth);
+}
+
+(function(depth) {
+    function foo() { function asmModule() { 'use asm'; return {} } };
+    if (depth)
+        surprise(depth - 1);
+})(2);