diff -r 22eb1f7416f1 -r a5ce9300462f src/hotspot/share/gc/g1/g1CollectedHeap.hpp
--- a/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	Wed Mar 27 10:25:12 2019 +0100
+++ b/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	Tue Apr 02 10:04:25 2019 +0200
@@ -1119,8 +1119,6 @@
     return _hrm->reserved();
   }
 
-  virtual bool is_in_closed_subset(const void* p) const;
-
   G1HotCardCache* g1_hot_card_cache() const { return _hot_card_cache; }
 
   G1CardTable* card_table() const {