--- old/src/share/vm/gc/g1/g1SATBCardTableModRefBS.cpp	2017-08-17 11:30:51.148334944 -0400
+++ new/src/share/vm/gc/g1/g1SATBCardTableModRefBS.cpp	2017-08-17 11:30:50.868629593 -0400
@@ -43,7 +43,7 @@
 
 void G1SATBCardTableModRefBS::enqueue(oop pre_val) {
   // Nulls should have been already filtered.
-  assert(pre_val->is_oop(true), "Error");
+  assert(oopDesc::is_oop(pre_val, true), "Error");
 
   if (!JavaThread::satb_mark_queue_set().is_active()) return;
   Thread* thr = Thread::current();