>      When we allowed read-only transactions to skip assigning XIDs, we
      introduced the possibility that a deleted btree page could be
      recycled while a read-only transaction was still in flight to it.
      This would result in incorrect index search results.  The probability
      of such an error occurring in the field seems very low because of the
      timing requirements, but nonetheless it should be fixed.
     </P
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><LI
><P
>      Fix crash-safety bug with newly-created-or-reset sequ