modulefinder no longer finds all required modules for Python itself, due to use of __import__ in sysconfig

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2016-12-30.02:16:05.800>
labels = ['3.7', 'library']
title = 'modulefinder no longer finds all required modules for Python itself, due to use of __import__ in sysconfig'
updated_at = <Date 2017-01-10.22:52:29.991>
user = 'https://github.com/adamwill'

bugs.python.org fields:

activity = <Date 2017-01-10.22:52:29.991>
actor = 'doko'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2016-12-30.02:16:05.800>
creator = 'adamwill'
dependencies = []
files = []
hgrepos = []
issue_num = 29113
keywords = []
message_count = 3.0
messages = ['284304', '285145', '285162']
nosy_count = 3.0
nosy_names = ['brett.cannon', 'doko', 'adamwill']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue29113'
versions = ['Python 3.6', 'Python 3.7']