103   static final Object tombstone = new Object();  field in IdentityHashMap
320               table[h] = tombstone;  in entrySet()
321               table[h + 1] = tombstone;  in entrySet()
381         if (key == emptyslot || key == tombstone)  in hashCode()
448               if (key == emptyslot || key == tombstone)  in keySet()
463               table[h] = tombstone;  in keySet()
464               table[h + 1] = tombstone;  in keySet()
503             if (oldkey != tombstone && oldkey != emptyslot)  in put()
560         table[h] = tombstone;  in remove()
561         table[h + 1] = tombstone;  in remove()
620                 table[i - 1] = tombstone;  in values()
621                 table[i] = tombstone;  in values()
662         if (table[h] == tombstone && del < 0)  in hash()
737       while (key == emptyslot || key == tombstone);  in next()
754       if (loc == table.length || table[loc] == tombstone)  in remove()
758       table[loc] = tombstone;  in remove()
759       table[loc + 1] = tombstone;  in remove()
803       if (knownMod != modCount || table[loc] == tombstone)  in equals()
820       if (knownMod != modCount || table[loc] == tombstone)  in getKey()
834       if (knownMod != modCount || table[loc] == tombstone)  in getValue()
850       if (knownMod != modCount || table[loc] == tombstone)  in hashCode()
866       if (knownMod != modCount || table[loc] == tombstone)  in setValue()
883       if (knownMod != modCount || table[loc] == tombstone)  in toString()
928         if (key != tombstone && key != emptyslot)  in writeObject()