From 0f0060f8c3a3a5de1580011f5790171846755e5d Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Sat, 21 May 2022 17:04:13 +0800
Subject: [PATCH] fix: add a null ptr check.

---
 source/util/src/thash.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/util/src/thash.c b/source/util/src/thash.c
index 89fc446da9..18404f8bde 100644
--- a/source/util/src/thash.c
+++ b/source/util/src/thash.c
@@ -778,7 +778,9 @@ static void *taosHashReleaseNode(SHashObj *pHashObj, void *p, int *slot) {
       } else {
         pe->next = pOld->next;
         SHashNode* x = pe->next;
-        ASSERT(x->next != x);
+        if (x != NULL) {
+          ASSERT(x->next != x);
+        }
       }
 
       pe->num--;