From 99e11315360d700ca7abb251e3a6774de6f46be1 Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Wed, 23 Dec 1998 21:58:38 +0000
Subject: Avoid crash in parsedate_tz() on certain invalid dates -- when the
 field assumed to be the time is in fact the year, the resulting list doesn't
 have enough items, and this isn't checked for.  Return None instead.

---
 Lib/rfc822.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Lib/rfc822.py b/Lib/rfc822.py
index 2e97ef4..b466fae 100644
--- a/Lib/rfc822.py
+++ b/Lib/rfc822.py
@@ -800,8 +800,10 @@ def parsedate_tz(data):
     if len(tm) == 2:
         [thh, tmm] = tm
         tss = '0'
-    else:
+    elif len(tm) == 3:
         [thh, tmm, tss] = tm
+    else:
+        return None
     try:
         yy = string.atoi(yy)
         dd = string.atoi(dd)
-- 
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