From c2e5be04214acea0bb93f21155333853ab73641a Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 3 Dec 2018 18:02:57 +0100
Subject: [PATCH] RESP3: fix zrangeGenericCommand() proto dependent array len.

---
 src/t_zset.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/t_zset.c b/src/t_zset.c
index 2efdcd260..0427ee887 100644
--- a/src/t_zset.c
+++ b/src/t_zset.c
@@ -2445,9 +2445,13 @@ void zrangeGenericCommand(client *c, int reverse) {
     if (end >= llen) end = llen-1;
     rangelen = (end-start)+1;
 
-    /* Return the result in form of a multi-bulk reply */
-    if (withscores && c->resp == 2) rangelen *= 2;
-    addReplyArrayLen(c, rangelen);
+    /* Return the result in form of a multi-bulk reply. RESP3 clients
+     * will receive sub arrays with score->element, while RESP2 returned
+     * a flat array. */
+    if (withscores && c->resp == 2)
+        addReplyArrayLen(c, rangelen*2);
+    else
+        addReplyArrayLen(c, rangelen);
 
     if (zobj->encoding == OBJ_ENCODING_ZIPLIST) {
         unsigned char *zl = zobj->ptr;