Inconsistent Execution of Generic Descriptor Attributes

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-05-25.00:13:08.633>
labels = ['interpreter-core', 'type-bug', '3.8', '3.9', '3.10']
title = 'Inconsistent Execution of Generic Descriptor Attributes'
updated_at = <Date 2021-03-05.13:49:26.164>
user = 'https://github.com/rmorshea'

bugs.python.org fields:

activity = <Date 2021-03-05.13:49:26.164>
actor = 'rhettinger'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2017-05-25.00:13:08.633>
creator = 'Ryan Morshead'
dependencies = []
files = []
hgrepos = []
issue_num = 30469
keywords = []
message_count = 3.0
messages = ['294415', '294424', '294428']
nosy_count = 3.0
nosy_names = ['rhettinger', 'eryksun', 'Ryan Morshead']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue30469'
versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']