From f79c32dbfb063703a0474b13dd87bbaa4587d5e6 Mon Sep 17 00:00:00 2001
From: Tim Peters <tim.peters@gmail.com>
Date: Mon, 31 Jul 2006 02:53:03 +0000
Subject: ZipFile.close():  Kill the other struct.pack deprecation warning on
 Windows.

Afraid I can't detect a pattern to when the pack formats decide
to use a signed or unsigned format code -- appears nearly
arbitrary to my eyes.  So I left all the pack formats alone and
changed the special-case data values instead.
---
 Lib/zipfile.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/zipfile.py b/Lib/zipfile.py
index 2819f1b..5c3fff3 100644
--- a/Lib/zipfile.py
+++ b/Lib/zipfile.py
@@ -664,7 +664,7 @@ class ZipFile:
 
                 if zinfo.header_offset > ZIP64_LIMIT:
                     extra.append(zinfo.header_offset)
-                    header_offset = 0xffffffff #-1
+                    header_offset = -1  # struct "l" format:  32 one bits
                 else:
                     header_offset = zinfo.header_offset
 
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