From c82bb5215293b5b3250593eadb6d463106007efe Mon Sep 17 00:00:00 2001
From: linzhiji <linzhiji@ishehui.com>
Date: Wed, 18 Sep 2024 13:44:47 +0800
Subject: [PATCH] Fix when used TZLocal, will report error

---
 backtrader/utils/dateintern.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/backtrader/utils/dateintern.py b/backtrader/utils/dateintern.py
index a69977c50..3db191e73 100644
--- a/backtrader/utils/dateintern.py
+++ b/backtrader/utils/dateintern.py
@@ -118,6 +118,8 @@ def tzname(self, dt):
         return _time.tzname[self._isdst(dt)]
 
     def _isdst(self, dt):
+        if not dt:
+            return False
         tt = (dt.year, dt.month, dt.day,
               dt.hour, dt.minute, dt.second,
               dt.weekday(), 0, 0)