From 954523cdfe229f1cb99a43a19e291a557ae2822d Mon Sep 17 00:00:00 2001
From: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: Tue, 1 Apr 2014 19:19:47 +0300
Subject: [PATCH] Fix bug in the new B-tree incomplete-split code.

Inserting a downlink to an internal page clears the incomplete-split flag
of the child's left sibling, so the left sibling's LSN also needs to be
updated.
---
 src/backend/access/nbtree/nbtinsert.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/backend/access/nbtree/nbtinsert.c b/src/backend/access/nbtree/nbtinsert.c
index 3fbeb41d6a..d2ca8d9350 100644
--- a/src/backend/access/nbtree/nbtinsert.c
+++ b/src/backend/access/nbtree/nbtinsert.c
@@ -910,6 +910,10 @@ _bt_insertonpg(Relation rel,
 			{
 				PageSetLSN(metapg, recptr);
 			}
+			if (BufferIsValid(cbuf))
+			{
+				PageSetLSN(BufferGetPage(cbuf), recptr);
+			}
 
 			PageSetLSN(page, recptr);
 		}
@@ -1402,6 +1406,10 @@ _bt_split(Relation rel, Buffer buf, Buffer cbuf, OffsetNumber firstright,
 		{
 			PageSetLSN(spage, recptr);
 		}
+		if (!isleaf)
+		{
+			PageSetLSN(BufferGetPage(cbuf), recptr);
+		}
 	}
 
 	END_CRIT_SECTION();