--- old/src/hotspot/share/gc/cms/parNewGeneration.hpp	2018-06-11 15:58:45.295616292 +0200
+++ new/src/hotspot/share/gc/cms/parNewGeneration.hpp	2018-06-11 15:58:45.084609040 +0200
@@ -245,6 +245,7 @@
                 HeapWord*              young_old_boundary,
                 ParScanThreadStateSet* state_set,
                 StrongRootsScope*      strong_roots_scope);
+  ~ParNewGenTask();
 
   HeapWord* young_old_boundary() { return _young_old_boundary; }