From 0aec9fb1830bf3441b044f98cb306dc3432455ef Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Mon, 20 Jul 1998 15:49:28 +0000
Subject: Add missing initializer for self._backupfilename.  Due to Ralph
 Butler.

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

diff --git a/Lib/fileinput.py b/Lib/fileinput.py
index 2f895e9..2e26b5b 100644
--- a/Lib/fileinput.py
+++ b/Lib/fileinput.py
@@ -142,6 +142,7 @@ class FileInput:
         self._filelineno = 0
         self._file = None
         self._isstdin = 0
+        self._backupfilename = None
 
     def __del__(self):
         self.close()
-- 
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