From c128190026efd36e8b472d8874f7f54c79ba3e06 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 11 Sep 2017 11:06:53 +0200
Subject: [PATCH] Streams: fix handleClientsBlockedOnKeys() access to invalid
 ID.

---
 src/blocked.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/blocked.c b/src/blocked.c
index 3cf661aa..519a402c 100644
--- a/src/blocked.c
+++ b/src/blocked.c
@@ -311,9 +311,12 @@ void handleClientsBlockedOnKeys(void) {
                             (s->last_id.ms == gt->ms &&
                              s->last_id.seq > gt->seq))
                         {
-                            unblockClient(receiver);
                             streamID start = *gt;
                             start.seq++; /* Can't overflow, it's an uint64_t */
+                            /* Note that after we unblock the client, 'gt'
+                             * is no longer valid, so we must do it after
+                             * we copied the ID into the 'start' variable. */
+                            unblockClient(receiver);
 
                             /* Emit the two elements sub-array consisting of
                              * the name of the stream and the data we