test_shared_memory_SharedMemoryServer_ignores_sigint and others fail on Guix

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-11-19.10:21:15.338>
labels = ['3.8', 'tests']
title = 'test_shared_memory_SharedMemoryServer_ignores_sigint and others fail on Guix'
updated_at = <Date 2019-11-19.10:21:15.338>
user = 'https://bugs.python.org/tlecarrour'

bugs.python.org fields:

activity = <Date 2019-11-19.10:21:15.338>
actor = 'tlecarrour'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Tests']
creation = <Date 2019-11-19.10:21:15.338>
creator = 'tlecarrour'
dependencies = []
files = ['48720']
hgrepos = []
issue_num = 38845
keywords = ['patch']
message_count = 1.0
messages = ['356959']
nosy_count = 1.0
nosy_names = ['tlecarrour']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue38845'
versions = ['Python 3.8']