commit 622a903cf88931878cbaba9bdd25c9835af0d055
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Date:   Fri Jun 26 15:33:19 2015 -0300

    Fix BRIN xlog replay

diff --git a/src/backend/access/brin/brin_xlog.c b/src/backend/access/brin/brin_xlog.c
index 49261aa..e68f623 100644
--- a/src/backend/access/brin/brin_xlog.c
+++ b/src/backend/access/brin/brin_xlog.c
@@ -47,6 +47,7 @@ brin_xlog_insert_update(XLogReaderState *record,
 {
 	XLogRecPtr	lsn = record->EndRecPtr;
 	Buffer		buffer;
+	BlockNumber	blkno;
 	Page		page;
 	XLogRedoAction action;
 
@@ -66,6 +67,8 @@ brin_xlog_insert_update(XLogReaderState *record,
 		action = XLogReadBufferForRedo(record, 0, &buffer);
 	}
 
+	blkno = BufferGetBlockNumber(buffer);
+
 	/* insert the index item into the page */
 	if (action == BLK_NEEDS_REDO)
 	{
@@ -97,7 +100,6 @@ brin_xlog_insert_update(XLogReaderState *record,
 	if (action == BLK_NEEDS_REDO)
 	{
 		ItemPointerData tid;
-		BlockNumber blkno = BufferGetBlockNumber(buffer);
 
 		ItemPointerSet(&tid, blkno, xlrec->offnum);
 		page = (Page) BufferGetPage(buffer);