os.sched_setaffinity does not handle errors during iteration.

[brandtbucher]

BPO	37420
Nosy	@benjaminp, @miss-islington, @brandtbucher
PRs	bpo-37420: os.sched_setaffinity does not handle errors during iteration. #14414 [3.7] closes bpo-37420: Handle errors during iteration in os.sched_setaffinity. (GH-14414) #14425 [3.8] closes bpo-37420: Handle errors during iteration in os.sched_setaffinity. (GH-14414) #14426

^{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 2019-06-27.16:11:13.968>
created_at = <Date 2019-06-26.22:22:26.691>
labels = ['type-bug', 'library', '3.9']
title = 'os.sched_setaffinity does not handle errors during iteration.'
updated_at = <Date 2019-06-27.16:45:35.150>
user = 'https://github.com/brandtbucher'

bugs.python.org fields:

activity = <Date 2019-06-27.16:45:35.150>
actor = 'miss-islington'
assignee = 'none'
closed = True
closed_date = <Date 2019-06-27.16:11:13.968>
closer = 'benjamin.peterson'
components = ['Library (Lib)']
creation = <Date 2019-06-26.22:22:26.691>
creator = 'brandtbucher'
dependencies = []
files = []
hgrepos = []
issue_num = 37420
keywords = ['patch']
message_count = 4.0
messages = ['346691', '346751', '346754', '346757']
nosy_count = 3.0
nosy_names = ['benjamin.peterson', 'miss-islington', 'brandtbucher']
pr_nums = ['14414', '14425', '14426']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue37420'
versions = ['Python 3.9']

[brandtbucher]

This is related to bpo-37417: os.sched_setaffinity doesn't properly handle errors that arise during iteration of the mask argument:

Python 3.9.0a0 (heads/master:d52a83a, Jun 26 2019, 15:13:41) 
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> bad_iter = map(int, "0X")
>>> os.sched_setaffinity(0, bad_iter)
ValueError: invalid literal for int() with base 10: 'X'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
SystemError: <built-in function sched_setaffinity> returned a result with an error set

It looks like this bug is also present on all versions of Python 3. I've attached a patch with a fix and a regression test.

[benjaminp]

New changeset 45a30af by Benjamin Peterson (Brandt Bucher) in branch 'master':
closes bpo-37420: Handle errors during iteration in os.sched_setaffinity. (GH-14414)
45a30af

[miss-islington]

New changeset 65e1872 by Miss Islington (bot) in branch '3.7':
closes bpo-37420: Handle errors during iteration in os.sched_setaffinity. (GH-14414)
65e1872

[miss-islington]

New changeset 6fbed53 by Miss Islington (bot) in branch '3.8':
closes bpo-37420: Handle errors during iteration in os.sched_setaffinity. (GH-14414)
6fbed53