From 24e6eebe82960aad49f5004ffe6ce8ed4091fd8e Mon Sep 17 00:00:00 2001
From: Vinay Sajip <vinay_sajip@yahoo.co.uk>
Date: Fri, 30 Jul 2021 12:48:50 +0100
Subject: [PATCH] bpo-44753: Don't use logfile extension when determining old
 files to be deleted (GH-27475) (cherry picked from commit
 6ff890380971752299325bd28eab80ec936975cf)

Co-authored-by: Vinay Sajip <vinay_sajip@yahoo.co.uk>
---
 Lib/logging/handlers.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Lib/logging/handlers.py b/Lib/logging/handlers.py
index 867ef4ebc7600a..74b67602fa94fe 100644
--- a/Lib/logging/handlers.py
+++ b/Lib/logging/handlers.py
@@ -356,7 +356,8 @@ def getFilesToDelete(self):
         dirName, baseName = os.path.split(self.baseFilename)
         fileNames = os.listdir(dirName)
         result = []
-        prefix = baseName + "."
+        # See bpo-44753: Don't use the extension when computing the prefix.
+        prefix = os.path.splitext(baseName)[0] + "."
         plen = len(prefix)
         for fileName in fileNames:
             if fileName[:plen] == prefix: