Multiprocessing does not work properly when using the trace module.

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-10-18.06:54:41.871>
labels = ['type-bug', '3.9', 'OS-windows']
title = 'Multiprocessing does not work properly when using the trace module.'
updated_at = <Date 2019-10-18.11:46:53.991>
user = 'https://github.com/rls1004'

bugs.python.org fields:

activity = <Date 2019-10-18.11:46:53.991>
actor = '\xd8\xaa\xd8\xa7\xd8\xb4\xd9\x8a\xd8\xb1\xd8\xa7\xd8\xaa \xd9\x85\xd8\xb3\xd8\xa7\xd9\x86\xd8\xaf'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Windows']
creation = <Date 2019-10-18.06:54:41.871>
creator = 'rls1004'
dependencies = []
files = ['48667']
hgrepos = []
issue_num = 38511
keywords = []
message_count = 2.0
messages = ['354864', '354879']
nosy_count = 6.0
nosy_names = ['paul.moore', 'tim.golden', 'zach.ware', 'steve.dower', 'rls1004', '\xd8\xaa\xd8\xa7\xd8\xb4\xd9\x8a\xd8\xb1\xd8\xa7\xd8\xaa \xd9\x85\xd8\xb3\xd8\xa7\xd9\x86\xd8\xaf']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue38511'
versions = ['Python 3.9']