zipfile leaves a file handle open if file is zero size

[skelker]

BPO	7169
Nosy	@amauryfa, @bitdancer, @briancurtin
Files	zipfileCrash.py: The attached script replicates the issue for me.

^{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 2009-10-26.12:43:52.495>
created_at = <Date 2009-10-19.13:33:47.634>
labels = ['OS-windows', 'type-crash']
title = 'zipfile leaves a file handle open if file is zero size'
updated_at = <Date 2009-10-28.19:19:36.655>
user = 'https://bugs.python.org/skelker'

bugs.python.org fields:

activity = <Date 2009-10-28.19:19:36.655>
actor = 'r.david.murray'
assignee = 'none'
closed = True
closed_date = <Date 2009-10-26.12:43:52.495>
closer = 'skelker'
components = ['Windows']
creation = <Date 2009-10-19.13:33:47.634>
creator = 'skelker'
dependencies = []
files = ['15165']
hgrepos = []
issue_num = 7169
keywords = []
message_count = 8.0
messages = ['94236', '94482', '94486', '94487', '94629', '94630', '94635', '94636']
nosy_count = 5.0
nosy_names = ['amaury.forgeotdarc', 'r.david.murray', 'brian.curtin', 'ryles', 'skelker']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue7169'
versions = ['Python 2.6']

[skelker]

I noticed today if I attempt to create a ZipFile object for read access,
and the zip file is zero bytes, the ZipFile object throws an exception,
but there is still an open handle to the file. So if I catch that
exception, and then try to delete the file, the delete then fails. I
have attached a script that replicates the issue.

[ryles]

I expect this should already be fixed by the commit in
http://bugs.python.org/issue6511

BadZipFile will now be raised for empty files rather than IOError, and
so ZipFile._GetContents() should now also close the file.

The fix was committed to trunk, but I don't see it merged into 2.6.

[skelker]

Thanks. I did do a search before opening my ticket. Not sure why I didn't see that in my search. Sorry for the duplicate ticket.

Steve Kelker
(952)882-4381 (or x4381)

[skelker]

Fixed in http://bugs.python.org/issue6511

[briancurtin]

Since the issue exists in 2.6 and is only currently fixed on trunk and
beyond, shouldn't the 6511 fix make it's way backwards into 2.6.x?

[skelker]

That would be great. Perhaps that should be discussed in 6511. I'll make a note there.

Steve Kelker
(952)882-4381 (or x4381)

[ryles]

Yes, I think this fix should have been included in the 2.6 branch. I
subscribed Amaury to look into that when I last updated.

[bitdancer]

The 2.6 branch was frozen except for critical issues during the release
process for 2.6.3 and then 2.6.4. Now that 2.6.4 is out, the bug fix
can be backported.