--- old/src/hotspot/share/gc/shenandoah/shenandoahVerifier.cpp	2020-01-24 15:21:08.764550574 +0100
+++ new/src/hotspot/share/gc/shenandoah/shenandoahVerifier.cpp	2020-01-24 15:21:08.548546943 +0100
@@ -88,7 +88,8 @@
       // For performance reasons, only fully verify non-marked field values.
       // We are here when the host object for *p is already marked.
 
-      if (_map->par_mark(obj)) {
+      HeapWord* addr = cast_from_oop<HeapWord*>(obj);
+      if (_map->par_mark(addr)) {
         verify_oop_at(p, obj);
         _stack->push(ShenandoahVerifierTask(obj));
       }