diff a/src/hotspot/share/gc/g1/g1CollectedHeap.hpp b/src/hotspot/share/gc/g1/g1CollectedHeap.hpp
--- a/src/hotspot/share/gc/g1/g1CollectedHeap.hpp
+++ b/src/hotspot/share/gc/g1/g1CollectedHeap.hpp
@@ -1328,25 +1328,26 @@
   bool is_marked_next(oop obj) const;
 
   // Determine if an object is dead, given the object and also
   // the region to which the object belongs. An object is dead
   // iff a) it was not allocated since the last mark, b) it
-  // is not marked, and c) it is not in an archive region.
+  // is not marked, and c) it is not in a closed archive region.
   bool is_obj_dead(const oop obj, const HeapRegion* hr) const {
     return
-      hr->is_obj_dead(obj, _cm->prev_mark_bitmap()) &&
-      !hr->is_archive();
+      hr->is_obj_dead(obj, _cm->prev_mark_bitmap());
+//            &&
+//      !hr->is_closed_archive(); // FIXME: remove
   }
 
   // This function returns true when an object has been
   // around since the previous marking and hasn't yet
-  // been marked during this marking, and is not in an archive region.
+  // been marked during this marking, and is not in a closed archive region.
   bool is_obj_ill(const oop obj, const HeapRegion* hr) const {
     return
       !hr->obj_allocated_since_next_marking(obj) &&
       !is_marked_next(obj) &&
-      !hr->is_archive();
+      !hr->is_open_archive();
   }
 
   // Determine if an object is dead, given only the object itself.
   // This will find the region to which the object belongs and
   // then call the region version of the same function.