select module uses uninitialized value "tv.tv_usec"

[tiran]

BPO	15921
Nosy	@tiran

^{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 2012-09-17.10:24:09.470>
created_at = <Date 2012-09-11.12:46:33.578>
labels = ['performance']
title = 'select module uses uninitialized value "tv.tv_usec"'
updated_at = <Date 2012-09-17.10:24:09.469>
user = 'https://github.com/tiran'

bugs.python.org fields:

activity = <Date 2012-09-17.10:24:09.469>
actor = 'jcea'
assignee = 'none'
closed = True
closed_date = <Date 2012-09-17.10:24:09.470>
closer = 'jcea'
components = []
creation = <Date 2012-09-11.12:46:33.578>
creator = 'christian.heimes'
dependencies = []
files = []
hgrepos = []
issue_num = 15921
keywords = ['3.3regression']
message_count = 2.0
messages = ['170299', '170321']
nosy_count = 3.0
nosy_names = ['christian.heimes', 'benj', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'resource usage'
url = 'https://bugs.python.org/issue15921'
versions = ['Python 3.3', 'Python 3.4']

[tiran]

Starting with Python 3.3 the select module access the uninitialized tv.tv_usec member of a timeval struct. I don't see the point of initializing the local variable long tv_usec from tv.tv_usec. The comment above the code states that long tv_usec is required as a workaround for Mac OS X.

http://hg.python.org/cpython/file/4754c4a710e6/Modules/selectmodule.c#l242

Coverity message:
CID 719694: Uninitialized scalar variable (UNINIT)At (5): Using uninitialized value "tv.tv_usec".
242 long tv_usec = tv.tv_usec;
243 if (_PyTime_ObjectToTimeval(tout, &tv.tv_sec, &tv_usec) == -1)
244 return NULL;
245 tv.tv_usec = tv_usec;

Suggested fix:
change line 242 to "long tv_usec;"

[python-dev]

New changeset 6cdc72f4d82c by Benjamin Peterson in branch 'default':
remove useless and defined initialization (closes bpo-15921)
http://hg.python.org/cpython/rev/6cdc72f4d82c