--- old/src/hotspot/share/gc/z/zRootsIterator.hpp	2018-06-11 15:58:49.649765933 +0200
+++ new/src/hotspot/share/gc/z/zRootsIterator.hpp	2018-06-11 15:58:49.441758785 +0200
@@ -164,6 +164,7 @@
 
 public:
   ZConcurrentWeakRootsIterator();
+  ~ZConcurrentWeakRootsIterator();
 
   void oops_do(OopClosure* cl);
 };