pyexpat.errors doesn't have __spec__ and __loader__ set

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-03-16.22:35:12.850>
labels = []
title = "pyexpat.errors doesn't have __spec__ and __loader__ set"
updated_at = <Date 2017-03-19.11:22:38.569>
user = 'https://github.com/manueljacob'

bugs.python.org fields:

activity = <Date 2017-03-19.11:22:38.569>
actor = 'ncoghlan'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2017-03-16.22:35:12.850>
creator = 'mjacob'
dependencies = []
files = []
hgrepos = []
issue_num = 29830
keywords = []
message_count = 5.0
messages = ['289737', '289773', '289774', '289824', '289845']
nosy_count = 4.0
nosy_names = ['brett.cannon', 'ncoghlan', 'eric.snow', 'mjacob']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue29830'
versions = []