--- old/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2018-04-27 11:07:51.783738233 +0200
+++ new/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2018-04-27 11:07:51.494729354 +0200
@@ -1677,12 +1677,7 @@
 
     assert(rp->num_queues() == active_workers, "why not");
 
-    rp->enqueue_discovered_references(executor, &pt);
-
     rp->verify_no_references_recorded();
-
-    pt.print_enqueue_phase();
-
     assert(!rp->discovery_enabled(), "Post condition");
   }