From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sun, 1 Feb 2015 17:01:10 +0000 (+0200)
Subject: Don't seek to the start of the file when open ZipFile with the 'w' mode
X-Git-Tag: v3.5.0a1~62
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5b90f5de26fc6a659e8bb2224c31af89c0b71d0b;p=thirdparty%2FPython%2Fcpython.git

Don't seek to the start of the file when open ZipFile with the 'w' mode
(regression introduced in issue #14099).
---

diff --git a/Lib/zipfile.py b/Lib/zipfile.py
index 845c6a96fc61..8c2950f53331 100644
--- a/Lib/zipfile.py
+++ b/Lib/zipfile.py
@@ -1002,7 +1002,7 @@ class ZipFile:
                 # set the modified flag so central directory gets written
                 # even if no files are added to the archive
                 self._didModify = True
-                self.start_dir = 0
+                self.start_dir = self.fp.tell()
             elif mode == 'a':
                 try:
                     # See if file is a zip file