poplib suppresses exception on QUIT

[giampaolo]

BPO	11291
Nosy	@pitrou, @giampaolo
Files	poplib_quit.patch

^{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 2011-02-25.22:28:51.961>
created_at = <Date 2011-02-22.19:52:41.154>
labels = ['library']
title = 'poplib suppresses exception on QUIT'
updated_at = <Date 2011-02-25.22:28:51.958>
user = 'https://github.com/giampaolo'

bugs.python.org fields:

activity = <Date 2011-02-25.22:28:51.958>
actor = 'giampaolo.rodola'
assignee = 'none'
closed = True
closed_date = <Date 2011-02-25.22:28:51.961>
closer = 'giampaolo.rodola'
components = ['Library (Lib)']
creation = <Date 2011-02-22.19:52:41.154>
creator = 'giampaolo.rodola'
dependencies = []
files = ['20846']
hgrepos = []
issue_num = 11291
keywords = ['patch']
message_count = 2.0
messages = ['129114', '129446']
nosy_count = 2.0
nosy_names = ['pitrou', 'giampaolo.rodola']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue11291'
versions = ['Python 3.3']

[giampaolo]

Unlike ftplib, smtplib and probably others, poplib suppresses error_proto exceptions on quit().
I'm not sure in what circumstances a POP3 server can return a negative response on QUIT but if this happens poplib should raise an exception.
Users who don't care about QUIT response can use the new close() method.
For backward compatibility patch should only be applied to Python 3.3 .

[giampaolo]

Fixed in r88620.