--- a/src/hotspot/share/gc/shared/collectedHeap.cpp	Wed Oct 18 19:36:17 2017 -0700
+++ b/src/hotspot/share/gc/shared/collectedHeap.cpp	Thu Oct 19 11:25:55 2017 +0200
@@ -347,7 +347,6 @@
              "Mismatch: multiple objects?");
     }
     BarrierSet* bs = barrier_set();
-    assert(bs->has_write_region_opt(), "No write_region() on BarrierSet");
     bs->write_region(deferred);
     // "Clear" the deferred_card_mark field
     thread->set_deferred_card_mark(MemRegion());
@@ -430,7 +429,6 @@
     } else {
       // Do the card mark
       BarrierSet* bs = barrier_set();
-      assert(bs->has_write_region_opt(), "No write_region() on BarrierSet");
       bs->write_region(mr);
     }
   }