--- a/src/hotspot/share/gc/g1/g1RemSet.hpp	Wed Jul 17 23:22:48 2019 +0900
+++ b/src/hotspot/share/gc/g1/g1RemSet.hpp	Wed Jul 17 16:33:19 2019 +0200
@@ -67,6 +67,7 @@
   G1Policy*              _g1p;
   G1HotCardCache*        _hot_card_cache;
 
+  void print_merge_heap_roots_stats();
 public:
 
   typedef CardTable::CardValue CardValue;