Fix invalid offset calculation in add_page_item()

Alexander Korotkov · Alexander Korotkov · commit 4e1593688eda · 2018-05-11T11:08:49.000+03:00
diff --git a/contrib/in_memory/btree_page.c b/contrib/in_memory/btree_page.c
@@ -383,7 +383,7 @@ add_page_item(Page p, OffsetNumber offset, LocationIndex size)
 				BTREE_PAGE_GET_END_OFFSET(header, offset) -
 				BTREE_PAGE_GET_START_OFFSET(header, count - 1));
 
-		for (i = count + 1; i > offset; i--)
+		for (i = count; i > offset; i--)
 			header->items[i] = header->items[i - 1] - size;
 	}
 

Original file line number	Diff line number	Diff line change
`@@ -383,7 +383,7 @@ add_page_item(Page p, OffsetNumber offset, LocationIndex size)`
`383`	`383`	`BTREE_PAGE_GET_END_OFFSET(header, offset) -`
`384`	`384`	`BTREE_PAGE_GET_START_OFFSET(header, count - 1));`
`385`	`385`
`386`		`- for (i = count + 1; i > offset; i--)`
	`386`	`+ for (i = count; i > offset; i--)`
`387`	`387`	`header->items[i] = header->items[i - 1] - size;`
`388`	`388`	`}`
`389`	`389`