multiprocessing.get hangs if the pool is closed in the signal handler

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-06-19.19:49:48.653>
labels = ['type-bug', 'library', '3.10']
title = 'multiprocessing.get hangs if the pool is closed in the signal handler'
updated_at = <Date 2021-06-19.19:49:48.653>
user = 'https://github.com/chaitu-tk'

bugs.python.org fields:

activity = <Date 2021-06-19.19:49:48.653>
actor = 'tkc17'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-06-19.19:49:48.653>
creator = 'tkc17'
dependencies = []
files = ['50121']
hgrepos = []
issue_num = 44462
keywords = []
message_count = 1.0
messages = ['396151']
nosy_count = 1.0
nosy_names = ['tkc17']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44462'
versions = ['Python 3.10']