From d859926b298516402a1e8b963cf62e568f0eb848 Mon Sep 17 00:00:00 2001
From: Vinay Sajip <vinay_sajip@yahoo.co.uk>
Date: Fri, 6 Sep 2013 10:10:22 +0100
Subject: [PATCH] Issue #18940: Handled low-volume logging when delay is True.

---
 Lib/logging/handlers.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Lib/logging/handlers.py b/Lib/logging/handlers.py
index 93aa50ea832..f0f634e8d38 100644
--- a/Lib/logging/handlers.py
+++ b/Lib/logging/handlers.py
@@ -111,7 +111,9 @@ def rotate(self, source, dest):
                        what the source is rotated to, e.g. 'test.log.1'.
         """
         if not callable(self.rotator):
-            os.rename(source, dest)
+            # Issue 18940: A file may not have been created if delay is True.
+            if os.path.exists(source):
+                os.rename(source, dest)
         else:
             self.rotator(source, dest)