Code objects can contain unmarshallable objects

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-09-07.13:57:18.092>
labels = []
title = 'Code objects can contain unmarshallable objects'
updated_at = <Date 2021-09-07.17:23:45.434>
user = 'https://github.com/encukou'

bugs.python.org fields:

activity = <Date 2021-09-07.17:23:45.434>
actor = 'shihai1991'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2021-09-07.13:57:18.092>
creator = 'petr.viktorin'
dependencies = []
files = ['50268', '50269']
hgrepos = []
issue_num = 45127
keywords = []
message_count = 3.0
messages = ['401277', '401278', '401281']
nosy_count = 4.0
nosy_names = ['petr.viktorin', 'shihai1991', 'FFY00', 'DiddiLeija']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue45127'
versions = []