Should io.TextIOWrapper raise an error at instantiation if a StringIO is passed as 'buffer'?

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-09-04.16:09:55.125>
labels = ['3.8', 'type-bug', 'library', '3.9']
title = "Should io.TextIOWrapper raise an error at instantiation if a StringIO is passed as 'buffer'?"
updated_at = <Date 2019-09-04.16:09:55.125>
user = 'https://github.com/bskinn'

bugs.python.org fields:

activity = <Date 2019-09-04.16:09:55.125>
actor = 'bskinn'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2019-09-04.16:09:55.125>
creator = 'bskinn'
dependencies = []
files = []
hgrepos = []
issue_num = 38029
keywords = []
message_count = 1.0
messages = ['351139']
nosy_count = 1.0
nosy_names = ['bskinn']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue38029'
versions = ['Python 3.8', 'Python 3.9']