From 60ef787efad8be46afa29ec751532e3ea7ebd70c Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Wed, 18 Apr 2012 17:38:02 +0200
Subject: [PATCH] Document mostly dead code in RPOPLPUSH implementation.

---
 src/t_list.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/t_list.c b/src/t_list.c
index 6a16a632..ca03916b 100644
--- a/src/t_list.c
+++ b/src/t_list.c
@@ -699,6 +699,8 @@ void rpoplpushCommand(redisClient *c) {
         checkType(c,sobj,REDIS_LIST)) return;
 
     if (listTypeLength(sobj) == 0) {
+        /* This may only happen after loading very old RDB files. Recent
+         * versions of Redis delete keys of empty lists. */
         addReply(c,shared.nullbulk);
     } else {
         robj *dobj = lookupKeyWrite(c->db,c->argv[2]);
-- 
2.45.2