diff -r 39063b484ec2 -r 9119841280f4 hotspot/src/share/vm/gc/parallel/psParallelCompact.cpp
--- a/hotspot/src/share/vm/gc/parallel/psParallelCompact.cpp	Wed Aug 23 10:25:25 2017 +0200
+++ b/hotspot/src/share/vm/gc/parallel/psParallelCompact.cpp	Wed Aug 23 14:52:55 2017 -0400
@@ -2597,7 +2597,7 @@
         start_array->allocate_block(addr);
       }
       cm->update_contents(oop(addr));
-      assert(oop(addr)->is_oop_or_null(), "Expected an oop or NULL at " PTR_FORMAT, p2i(oop(addr)));
+      assert(oopDesc::is_oop_or_null(oop(addr)), "Expected an oop or NULL at " PTR_FORMAT, p2i(oop(addr)));
     }
   }
 }
@@ -3144,7 +3144,7 @@
 
   oop moved_oop = (oop) destination();
   compaction_manager()->update_contents(moved_oop);
-  assert(moved_oop->is_oop_or_null(), "Expected an oop or NULL at " PTR_FORMAT, p2i(moved_oop));
+  assert(oopDesc::is_oop_or_null(moved_oop), "Expected an oop or NULL at " PTR_FORMAT, p2i(moved_oop));
 
   update_state(words);
   assert(destination() == (HeapWord*)moved_oop + moved_oop->size(), "sanity");