PageAddItem in overwrite mode: must *NOT* check itemid' flag if

OffsetNumber == MaxOffsetNumber + 1 - there may be garbage there!

src/backend/storage/page/bufpage.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/page/bufpage.c,v 1.35 2001/01/24 19:43:08 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/page/bufpage.c,v 1.36 2001/02/06 06:24:00 vadim Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -112,12 +112,15 @@ PageAddItem(Page page,
 				elog(NOTICE, "PageAddItem: tried overwrite after maxoff");
 				return InvalidOffsetNumber;
 			}
-			itemId = &((PageHeader) page)->pd_linp[offsetNumber - 1];
-			if (((*itemId).lp_flags & LP_USED) ||
-				((*itemId).lp_len != 0))
+			if (offsetNumber < limit)
 			{
-				elog(NOTICE, "PageAddItem: tried overwrite of used ItemId");
-				return InvalidOffsetNumber;
+				itemId = &((PageHeader) page)->pd_linp[offsetNumber - 1];
+				if (((*itemId).lp_flags & LP_USED) ||
+					((*itemId).lp_len != 0))
+				{
+					elog(NOTICE, "PageAddItem: tried overwrite of used ItemId");
+					return InvalidOffsetNumber;
+				}
 			}
 		}
 		else