--- old/src/share/vm/gc_implementation/g1/g1StringDedupQueue.hpp	2015-04-15 12:34:18.905855660 +0200
+++ new/src/share/vm/gc_implementation/g1/g1StringDedupQueue.hpp	2015-04-15 12:34:18.769851088 +0200
@@ -72,6 +72,7 @@
   uintx                      _dropped;
 
   G1StringDedupQueue();
+  // Never called.
   ~G1StringDedupQueue();
 
   static void unlink_or_oops_do(G1StringDedupUnlinkOrOopsDoClosure* cl, size_t queue);