Signal handler is invoked recursively

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-02-24.03:22:43.316>
labels = ['extension-modules', 'type-bug']
title = 'Signal handler is invoked recursively'
updated_at = <Date 2020-02-24.03:22:43.316>
user = 'https://github.com/msakai'

bugs.python.org fields:

activity = <Date 2020-02-24.03:22:43.316>
actor = 'msakai'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Extension Modules']
creation = <Date 2020-02-24.03:22:43.316>
creator = 'msakai'
dependencies = []
files = []
hgrepos = []
issue_num = 39735
keywords = []
message_count = 1.0
messages = ['362562']
nosy_count = 1.0
nosy_names = ['msakai']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue39735'
versions = []