Namespace disassembly omits some compiled objects

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-08-14.06:39:45.401>
labels = ['3.7']
title = 'Namespace disassembly omits some compiled objects'
updated_at = <Date 2017-08-18.02:26:15.646>
user = 'https://github.com/ncoghlan'

bugs.python.org fields:

activity = <Date 2017-08-18.02:26:15.646>
actor = 'ncoghlan'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2017-08-14.06:39:45.401>
creator = 'ncoghlan'
dependencies = []
files = []
hgrepos = []
issue_num = 31197
keywords = []
message_count = 4.0
messages = ['300234', '300235', '300291', '300469']
nosy_count = 1.0
nosy_names = ['ncoghlan']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue31197'
versions = ['Python 3.7']