diff -up v8-3.14.5.10/src/log.cc.builtinnames v8-3.14.5.10/src/log.cc

--- v8-3.14.5.10/src/log.cc.builtinnames	2016-07-06 11:25:12.341766992 -0400

+++ v8-3.14.5.10/src/log.cc	2016-07-06 11:25:41.065609632 -0400

@@ -1485,7 +1485,11 @@ void Logger::LogCodeObject(Object* objec

         tag = Logger::STUB_TAG;

         break;

       case Code::BUILTIN:

-        description = "A builtin from the snapshot";

+        description =

+            Isolate::Current()->builtins()->Lookup(code_object->entry());

+        if (description == NULL) {

+          description = "A builtin from the snapshot";

+        }

         tag = Logger::BUILTIN_TAG;

         break;

       case Code::KEYED_LOAD_IC: