TypeError when parsing regexp with unicode named character sequence escape #90568

assignee = None
closed_at = None
created_at = <Date 2022-01-17.12:31:30.830>
labels = ['expert-regex', 'interpreter-core', 'type-feature', 'expert-unicode', '3.11']
title = 'TypeError when parsing regexp with unicode named character sequence escape'
updated_at = <Date 2022-03-19.11:22:19.310>
user = 'https://github.com/jirkamarsik'

activity = <Date 2022-03-19.11:22:19.310>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core', 'Regular Expressions', 'Unicode']
creation = <Date 2022-01-17.12:31:30.830>
creator = 'jirkamarsik'
dependencies = []
files = []
hgrepos = []
issue_num = 46410
keywords = []
message_count = 3.0
messages = ['410770', '410874', '415540']
nosy_count = 5.0
nosy_names = ['vstinner', 'ezio.melotti', 'mrabarnett', 'serhiy.storchaka', 'jirkamarsik']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue46410'
versions = ['Python 3.11']