zipimport doesn't support prepended junk

[jvr]

BPO	669036
Nosy	@theller

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2003-07-22.18:10:53.000>
created_at = <Date 2003-01-16.13:15:43.000>
labels = ['library']
title = "zipimport doesn't support prepended junk"
updated_at = <Date 2003-07-22.18:10:53.000>
user = 'https://bugs.python.org/jvr'

bugs.python.org fields:

activity = <Date 2003-07-22.18:10:53.000>
actor = 'theller'
assignee = 'jvr'
closed = True
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2003-01-16.13:15:43.000>
creator = 'jvr'
dependencies = []
files = []
hgrepos = []
issue_num = 669036
keywords = []
message_count = 2.0
messages = ['14102', '14103']
nosy_count = 2.0
nosy_names = ['theller', 'jvr']
pr_nums = []
priority = 'high'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue669036'
versions = ['Python 2.3']

[jvr]

Zip archives may be appended to/prepended by arbitrary data, but this is not supported by zipimport. zipfile.py does support this.
Unfortunately there's a fair amount of offset juggling going on, so a fix is not completely straightforward. This should be fixed before 2.3a2.

zipimport *also* doesn't support Zip archives that have a comment attached at the end of the file, but this is less important IMO.

[theller]

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See sf bpo-775637.