--- old/src/hotspot/share/gc/shared/ptrQueue.hpp	2018-11-20 17:32:10.829322235 -0500
+++ new/src/hotspot/share/gc/shared/ptrQueue.hpp	2018-11-20 17:32:10.441301306 -0500
@@ -154,7 +154,6 @@
   // get into an infinite loop).
   virtual bool should_enqueue_buffer() { return true; }
   void handle_zero_index();
-  void locking_enqueue_completed_buffer(BufferNode* node);
 
   void enqueue_known_active(void* ptr);