From 4bbc122eb72850b1d29d8aeb71ee9045720a579a Mon Sep 17 00:00:00 2001
From: dvora-h <67596500+dvora-h@users.noreply.github.com>
Date: Thu, 11 Jan 2024 10:41:16 +0200
Subject: [PATCH] Fix: hset unexpectedly mutates the list passed to items
 (#3103)

---
 redis/commands/core.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/redis/commands/core.py b/redis/commands/core.py
index 45eddef65f..dfc2296797 100644
--- a/redis/commands/core.py
+++ b/redis/commands/core.py
@@ -5017,14 +5017,16 @@ def hset(
         """
         if key is None and not mapping and not items:
             raise DataError("'hset' with no key value pairs")
-        items = items or []
+        pieces = []
+        if items:
+            pieces.extend(items)
         if key is not None:
-            items.extend((key, value))
+            pieces.extend((key, value))
         if mapping:
             for pair in mapping.items():
-                items.extend(pair)
+                pieces.extend(pair)
 
-        return self.execute_command("HSET", name, *items)
+        return self.execute_command("HSET", name, *pieces)
 
     def hsetnx(self, name: str, key: str, value: str) -> Union[Awaitable[bool], bool]:
         """