From b8e52321612f3fa7a3a78779700d74df99b154cf Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Fri, 19 Jan 2018 11:11:52 +0100
Subject: CG: fix parsing in XREADGROUP and streamLookupCG() NULL check.

---
 src/t_stream.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/t_stream.c b/src/t_stream.c
index 38b59a067..82c926b39 100644
--- a/src/t_stream.c
+++ b/src/t_stream.c
@@ -976,8 +976,8 @@ void xreadCommand(client *c) {
                                 "XREADGROUP. You called XREAD instead.");
                 return;
             }
-            groupname = c->argv[i]->ptr;
-            consumername = c->argv[i+1]->ptr;
+            groupname = c->argv[i+1]->ptr;
+            consumername = c->argv[i+2]->ptr;
             i += 2;
         } else {
             addReply(c,shared.syntaxerr);
@@ -1147,6 +1147,7 @@ void streamFreeCG(streamCG *cg) {
 /* Lookup the consumer group in the specified stream and returns its
  * pointer, otherwise if there is no such group, NULL is returned. */
 streamCG *streamLookupCG(stream *s, sds groupname) {
+    if (s->cgroups == NULL) return NULL;
     streamCG *cg = raxFind(s->cgroups,(unsigned char*)groupname,
                            sdslen(groupname));
     return (cg == raxNotFound) ? NULL : cg;
-- 
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