PyThread_acquire_lock can block even when asked not ot

pitrou

BPO	30765
Nosy	@ronaldoussoren, @pitrou, @vstinner, @ned-deily
PRs	bpo-30765: Avoid blocking when PyThread_acquire_lock() is asked not to #2403 [3.6] bpo-30765: Avoid blocking when PyThread_acquire_lock() is asked not to (GH-2403) #2418 [3.5] bpo-30765: Avoid blocking when PyThread_acquire_lock() is asked not to (GH-2403) #2419 [2.7] bpo-30765: Avoid blocking when PyThread_acquire_lock() is asked not to (GH-2403) #2420

^{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 2017-06-26.20:14:13.114>
created_at = <Date 2017-06-26.12:27:17.101>
labels = ['interpreter-core', 'type-bug', '3.7']
title = 'PyThread_acquire_lock can block even when asked not ot'
updated_at = <Date 2017-06-26.20:14:13.114>
user = 'https://github.com/pitrou'

bugs.python.org fields:

activity = <Date 2017-06-26.20:14:13.114>
actor = 'pitrou'
assignee = 'none'
closed = True
closed_date = <Date 2017-06-26.20:14:13.114>
closer = 'pitrou'
components = ['Interpreter Core']
creation = <Date 2017-06-26.12:27:17.101>
creator = 'pitrou'
dependencies = []
files = []
hgrepos = []
issue_num = 30765
keywords = []
message_count = 6.0
messages = ['296886', '296929', '296937', '296939', '296940', '296941']
nosy_count = 4.0
nosy_names = ['ronaldoussoren', 'pitrou', 'vstinner', 'ned.deily']
pr_nums = ['2403', '2418', '2419', '2420']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue30765'
versions = ['Python 2.7', 'Python 3.5', 'Python 3.6', 'Python 3.7']