--- a/hotspot/src/share/vm/services/heapDumper.cpp	Wed Aug 23 10:25:25 2017 +0200
+++ b/hotspot/src/share/vm/services/heapDumper.cpp	Wed Aug 23 14:52:55 2017 -0400
@@ -764,7 +764,7 @@
 
       // reflection and Unsafe classes may have a reference to a
       // Klass* so filter it out.
-      assert(o->is_oop_or_null(), "Expected an oop or NULL at " PTR_FORMAT, p2i(o));
+      assert(oopDesc::is_oop_or_null(o), "Expected an oop or NULL at " PTR_FORMAT, p2i(o));
       writer->write_objectID(o);
       break;
     }