--- a/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	Wed Mar 27 10:25:12 2019 +0100
+++ b/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	Tue Apr 02 10:04:25 2019 +0200
@@ -2731,7 +2731,7 @@
           // The remembered set might contain references to already freed
           // regions. Filter out such entries to avoid failing card table
           // verification.
-          if (g1h->is_in_closed_subset(ct->addr_for(card_ptr))) {
+          if (g1h->is_in(ct->addr_for(card_ptr))) {
             if (*card_ptr != G1CardTable::dirty_card_val()) {
               *card_ptr = G1CardTable::dirty_card_val();
               _dcq.enqueue(card_ptr);
@@ -4608,11 +4608,6 @@
          used(), recalculate_used());
 }
 
-bool G1CollectedHeap::is_in_closed_subset(const void* p) const {
-  HeapRegion* hr = heap_region_containing(p);
-  return hr->is_in(p);
-}
-
 // Methods for the mutator alloc region
 
 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size,