From: Pieter Noordhuis <pcnoordhuis@gmail.com>
Date: Wed, 3 Mar 2010 17:35:56 +0000 (+0100)
Subject: x->backward never equals zsl->header
X-Git-Url: https://git.saurik.com/redis.git/commitdiff_plain/709d0a1bbc9a10968b21b694019a78e39ef5f49f

x->backward never equals zsl->header
---

diff --git a/redis.c b/redis.c
index 1abfd96b..f750ca68 100644
--- a/redis.c
+++ b/redis.c
@@ -4931,8 +4931,7 @@ static int zslDelete(zskiplist *zsl, double score, robj *obj) {
             }
         }
         if (x->forward[0]) {
-            x->forward[0]->backward = (x->backward == zsl->header) ?
-                                        NULL : x->backward;
+            x->forward[0]->backward = x->backward;
         } else {
             zsl->tail = x->backward;
         }
@@ -4977,8 +4976,7 @@ static unsigned long zslDeleteRange(zskiplist *zsl, double min, double max, dict
             }
         }
         if (x->forward[0]) {
-            x->forward[0]->backward = (x->backward == zsl->header) ?
-                                        NULL : x->backward;
+            x->forward[0]->backward = x->backward;
         } else {
             zsl->tail = x->backward;
         }