Name collisions in pythoncore, preventing unity/jumbo build

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-04-02.22:14:07.199>
labels = ['interpreter-core', 'build', '3.9']
title = 'Name collisions in pythoncore, preventing unity/jumbo build'
updated_at = <Date 2020-04-02.22:14:07.199>
user = 'https://github.com/ariccio'

bugs.python.org fields:

activity = <Date 2020-04-02.22:14:07.199>
actor = 'Alexander Riccio'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2020-04-02.22:14:07.199>
creator = 'Alexander Riccio'
dependencies = []
files = []
hgrepos = []
issue_num = 40161
keywords = []
message_count = 1.0
messages = ['365636']
nosy_count = 1.0
nosy_names = ['Alexander Riccio']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue40161'
versions = ['Python 3.9']