From d481c0e564c101e147a44e30e5bd1bb997310566 Mon Sep 17 00:00:00 2001
From: Binbin <binloveplay1314@qq.com>
Date: Fri, 8 Dec 2023 15:51:14 +0800
Subject: [PATCH] Explicit judgment even if zfree can handle null pointers

---
 src/dict.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dict.c b/src/dict.c
index 36a3a8b29b9..79ab7f6845f 100644
--- a/src/dict.c
+++ b/src/dict.c
@@ -270,7 +270,7 @@ int _dictExpand(dict *d, unsigned long size, int* malloc_failed)
      * it can accept keys. */
     if (d->ht_table[0] == NULL || d->ht_used[0] == 0) {
         if (d->type->rehashingCompleted) d->type->rehashingCompleted(d);
-        if (d->ht_used[0] == 0) zfree(d->ht_table[0]);
+        if (d->ht_table[0] && d->ht_used[0] == 0) zfree(d->ht_table[0]);
         d->ht_size_exp[0] = new_ht_size_exp;
         d->ht_used[0] = new_ht_used;
         d->ht_table[0] = new_ht_table;