From 0220048083866034973ce7b05735ded97d2ca4d4 Mon Sep 17 00:00:00 2001
From: Vinay Sajip <vinay_sajip@yahoo.co.uk>
Date: Sat, 14 Jun 2014 10:22:05 +0100
Subject: [PATCH] Issue #21742: Set stream to None after closing.

---
 Lib/logging/handlers.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Lib/logging/handlers.py b/Lib/logging/handlers.py
index f547d17ca20..0e58dbea059 100644
--- a/Lib/logging/handlers.py
+++ b/Lib/logging/handlers.py
@@ -463,6 +463,7 @@ class WatchedFileHandler(logging.FileHandler):
                 # we have an open file handle, clean it up
                 self.stream.flush()
                 self.stream.close()
+                self.stream = None  # See Issue #21742: _open () might fail.
                 # open a new file handle and get new stat info from that fd
                 self.stream = self._open()
                 self._statstream()