From 005841ef46fc106a40a65d5c510165db7123a07e Mon Sep 17 00:00:00 2001
From: xingying01 <xingying01@corp.netease.com>
Date: Wed, 16 Jun 2021 17:27:12 +0800
Subject: [PATCH] fix for replication , because sub_iv may be NULL in extreme
 scenario

---
 sql/rpl_gtid_set.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sql/rpl_gtid_set.cc b/sql/rpl_gtid_set.cc
index 1e894e6b8a95..9f93417d8beb 100644
--- a/sql/rpl_gtid_set.cc
+++ b/sql/rpl_gtid_set.cc
@@ -1148,6 +1148,9 @@ bool Gtid_set::is_interval_subset(Const_interval_iterator *sub,
   */
   do
   {
+    if (sub_iv == NULL)
+      DBUG_RETURN(true);
+
     if (super_iv == NULL)
       DBUG_RETURN(false);