TemporaryDirectory objects should LOCK_SH to avoid being deleted by systemd-tmpfiles

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-07-22.12:10:54.060>
labels = ['type-feature', 'library']
title = 'TemporaryDirectory objects should LOCK_SH to avoid being deleted by systemd-tmpfiles'
updated_at = <Date 2019-07-22.12:28:47.155>
user = 'https://github.com/refi64'

bugs.python.org fields:

activity = <Date 2019-07-22.12:28:47.155>
actor = 'python-dev'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2019-07-22.12:10:54.060>
creator = 'refi64'
dependencies = []
files = []
hgrepos = []
issue_num = 37650
keywords = ['patch']
message_count = 1.0
messages = ['348295']
nosy_count = 1.0
nosy_names = ['refi64']
pr_nums = ['14908']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue37650'
versions = []