From bf670e0745100e1214e5d1ff74ff2e0d869a31ad Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 10 Feb 2014 18:33:34 +0100
Subject: [PATCH] Cluster: don't update slave's master if we don't know it.

There is no way we can update the slave's node->slaveof pointer if we
don't know the master (no node with such an ID in our tables).
---
 src/cluster.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cluster.c b/src/cluster.c
index 88c927d5..f9899fae 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -1363,7 +1363,7 @@ int clusterProcessPacket(clusterLink *link) {
                 }
 
                 /* Master node changed for this slave? */
-                if (sender->slaveof != master) {
+                if (master && sender->slaveof != master) {
                     if (sender->slaveof)
                         clusterNodeRemoveSlave(sender->slaveof,sender);
                     clusterNodeAddSlave(master,sender);