locale.getlocale fails if locale is set

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-02-03.13:42:50.296>
labels = ['3.8', '3.10', 'library', '3.9', 'OS-windows']
title = 'locale.getlocale fails if locale is set'
updated_at = <Date 2021-02-23.17:59:57.570>
user = 'https://github.com/AndersMunch'

bugs.python.org fields:

activity = <Date 2021-02-23.17:59:57.570>
actor = 'eryksun'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)', 'Windows']
creation = <Date 2021-02-03.13:42:50.296>
creator = 'AndersMunch'
dependencies = []
files = []
hgrepos = []
issue_num = 43115
keywords = []
message_count = 15.0
messages = ['386203', '387136', '387138', '387147', '387149', '387157', '387164', '387195', '387205', '387208', '387209', '387256', '387273', '387558', '387588']
nosy_count = 8.0
nosy_names = ['lemburg', 'paul.moore', 'tim.golden', 'zach.ware', 'eryksun', 'steve.dower', 'swt2c', 'AndersMunch']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue43115'
versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']