confusing BufferError: Existing exports of data: object cannot be re-sized

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-06-24.07:29:18.464>
labels = ['interpreter-core', 'type-bug']
title = 'confusing BufferError: Existing exports of data: object cannot be re-sized'
updated_at = <Date 2020-08-09.06:12:38.141>
user = 'https://github.com/arigo'

bugs.python.org fields:

activity = <Date 2020-08-09.06:12:38.141>
actor = 'Jeffrey.Kintscher'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2020-06-24.07:29:18.464>
creator = 'arigo'
dependencies = []
files = []
hgrepos = []
issue_num = 41097
keywords = ['patch']
message_count = 4.0
messages = ['372237', '372286', '375061', '375063']
nosy_count = 2.0
nosy_names = ['pewscorner', 'Jeffrey.Kintscher']
pr_nums = ['21792']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue41097'
versions = []