From b4048dfec07eba76304140241f6c923271f7b396 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Tue, 5 Nov 2013 15:32:21 +0100
Subject: [PATCH] SCAN: when iterating ziplists or intsets always return cursor
 of 0.

The previous implementation assumed that the first call always happens
with cursor set to 0, this may not be the case, and we want to return 0
anyway otherwise the (broken) client code will loop forever.
---
 src/db.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/db.c b/src/db.c
index c7de0049..1ed0bb2a 100644
--- a/src/db.c
+++ b/src/db.c
@@ -462,6 +462,7 @@ void scanGenericCommand(redisClient *c, robj *o) {
 
         while(intsetGet(o->ptr,pos++,&ll))
             listAddNodeTail(keys,createStringObjectFromLongLong(ll));
+        cursor = 0;
     } else if (o->type == REDIS_HASH || o->type == REDIS_ZSET) {
         unsigned char *p = ziplistIndex(o->ptr,0);
         unsigned char *vstr;
@@ -475,6 +476,7 @@ void scanGenericCommand(redisClient *c, robj *o) {
                                  createStringObjectFromLongLong(vll));
             p = ziplistNext(o->ptr,p);
         }
+        cursor = 0;
     } else {
         redisPanic("Not handled encoding in SCAN.");
     }