Fix resource leak in support.py:_is_ipv6_enabled

[bbrazil]

BPO	15277
Files	ipv6-enabled-fd-leak-fix.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 2012-07-07.16:47:15.558>
created_at = <Date 2012-07-07.14:16:01.842>
labels = ['tests', 'performance']
title = 'Fix resource leak in support.py:_is_ipv6_enabled'
updated_at = <Date 2012-07-07.16:49:09.363>
user = 'https://bugs.python.org/bbrazil'

bugs.python.org fields:

activity = <Date 2012-07-07.16:49:09.363>
actor = 'rosslagerwall'
assignee = 'rosslagerwall'
closed = True
closed_date = <Date 2012-07-07.16:47:15.558>
closer = 'rosslagerwall'
components = ['Tests']
creation = <Date 2012-07-07.14:16:01.842>
creator = 'bbrazil'
dependencies = []
files = ['26299']
hgrepos = []
issue_num = 15277
keywords = ['patch']
message_count = 4.0
messages = ['164855', '164907', '164908', '164910']
nosy_count = 3.0
nosy_names = ['bbrazil', 'rosslagerwall', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'resource usage'
url = 'https://bugs.python.org/issue15277'
versions = ['Python 3.3']

[bbrazil]

I'm running Ubuntu Precise and have net.ipv6.conf.all.disable_ipv6 = 1 in my sysctl.conf. With this configuration at head there's a fd leak in
_is_ipv6_enabled in support.py when the bind fails, which the attached patch should fix.

[python-dev]

New changeset c9299edf1f67 by Ross Lagerwall in branch 'default':
bpo-15277: Fix a resource leak in support.py when IPv6 is disabled.
http://hg.python.org/cpython/rev/c9299edf1f67

[rosslagerwall]

Thanks.

test_socket seems to be broken in all branches when running with net.ipv6.conf.all.disable_ipv6 = 1 but I'll open a new issue for that.

[rosslagerwall]

Ah, I see you've already opened a new issue for that (bpo-15284).