From 162acd8ac2bebe88b476d9253e49279d73ff305b 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 70d7a430..1286f824 100644
--- a/src/db.c
+++ b/src/db.c
@@ -452,6 +452,7 @@ 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;
@@ -465,6 +466,7 @@ void scanGenericCommand(redisClient *c, robj *o) {
                                  createStringObjectFromLongLong(vll));
             p = ziplistNext(o->ptr,p);
         }
+        cursor = 0;
     } else {
         redisPanic("Not handled encoding in SCAN.");
     }