--- a/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	Mon May 07 14:57:23 2018 +0200
+++ b/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	Mon May 07 14:57:25 2018 +0200
@@ -1338,6 +1338,9 @@
   void redirty_logged_cards();
   // Verification
 
+  // Deduplicate the string
+  virtual void deduplicate_string(oop str);
+
   // Perform any cleanup actions necessary before allowing a verification.
   virtual void prepare_for_verify();