--- old/src/share/vm/gc/g1/g1CollectedHeap.hpp	2017-07-25 14:10:56.741617002 +0200
+++ new/src/share/vm/gc/g1/g1CollectedHeap.hpp	2017-07-25 14:10:56.613617007 +0200
@@ -1389,6 +1389,8 @@
   // Unregister the given nmethod from the G1 heap.
   virtual void unregister_nmethod(nmethod* nm);
 
+  virtual void verify_nmethod_roots(nmethod* nmethod) {}
+
   // Free up superfluous code root memory.
   void purge_code_root_memory();
 
@@ -1436,8 +1438,6 @@
   virtual const char* const* concurrent_phases() const;
   virtual bool request_concurrent_phase(const char* phase);
 
-  void verify_nmethod_roots(nmethod* nmethod);
-
   // The methods below are here for convenience and dispatch the
   // appropriate method depending on value of the given VerifyOption
   // parameter. The values for that parameter, and their meanings,