[issue35130] add same file name to zipfile , result two files and same md5

[MasterZ]

New submission from MasterZ <silencemax at 163.com>:

step 1.I have one file named "1",then add this file to zipfile A.zip
step 2.then I have another file named "1" too but different content, and add this file to zipfile A.zip
result:in the A.zip exist 2 files both named "1" and both of their md5 is the name with step2's file

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components: IO
files: a.py
messages: 329041
nosy: MasterZ
priority: normal
severity: normal
status: open
title: add same file name to zipfile ,result two files and same md5
type: behavior
versions: Python 3.6
Added file: https://bugs.python.org/file47898/a.py

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35130>
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