*** a/src/backend/storage/lmgr/predicate.c
--- b/src/backend/storage/lmgr/predicate.c
***************
*** 722,731 **** OldSerXidInit(void)
   * Record a committed read write serializable xid and the minimum
   * commitSeqNo of any transactions to which this xid had a rw-conflict out.
   * A zero seqNo means that there were no conflicts out from xid.
-  *
-  * The return value is normally false -- true means that we're about to
-  * wrap around our space for tracking these xids, so the caller might want
-  * to take action to prevent that.
   */
  static void
  OldSerXidAdd(TransactionId xid, SerCommitSeqNo minConflictCommitSeqNo)
--- 722,727 ----