--- a/hotspot/src/share/vm/gc/parallel/psScavenge.cpp	Wed Aug 23 10:25:25 2017 +0200
+++ b/hotspot/src/share/vm/gc/parallel/psScavenge.cpp	Wed Aug 23 14:52:55 2017 -0400
@@ -95,7 +95,7 @@
 
   template <class T> void do_oop_work(T* p) {
     assert (!oopDesc::is_null(*p), "expected non-null ref");
-    assert ((oopDesc::load_decode_heap_oop_not_null(p))->is_oop(),
+    assert (oopDesc::is_oop(oopDesc::load_decode_heap_oop_not_null(p)),
             "expected an oop while scanning weak refs");
 
     // Weak refs may be visited more than once.