--- old/src/hotspot/share/memory/allocation.hpp	2017-09-26 14:32:09.920456562 -0700
+++ new/src/hotspot/share/memory/allocation.hpp	2017-09-26 14:32:09.584443874 -0700
@@ -233,7 +233,6 @@
   void print_address_on(outputStream* st) const;  // nonvirtual address printing
 
 #define METASPACE_OBJ_TYPES_DO(f) \
-  f(Unknown) \
   f(Class) \
   f(Symbol) \
   f(TypeArrayU1) \