Result of multiprocessing.heap.BufferWrapper.create_memoryview can point to freed memory

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-08-31.12:56:22.474>
labels = ['ctypes', 'library', '3.9', '3.10']
title = 'Result of multiprocessing.heap.BufferWrapper.create_memoryview can point to freed memory'
updated_at = <Date 2020-08-31.12:57:18.235>
user = 'https://bugs.python.org/EricWieser'

bugs.python.org fields:

activity = <Date 2020-08-31.12:57:18.235>
actor = 'Eric Wieser'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)', 'ctypes']
creation = <Date 2020-08-31.12:56:22.474>
creator = 'Eric Wieser'
dependencies = []
files = []
hgrepos = []
issue_num = 41673
keywords = []
message_count = 2.0
messages = ['376149', '376150']
nosy_count = 1.0
nosy_names = ['Eric Wieser']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue41673'
versions = ['Python 3.9', 'Python 3.10']