exception text is being sourced from the wrong file

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-03-11.01:51:16.936>
labels = ['3.8', 'type-bug', '3.7']
title = 'exception text is being sourced from the wrong file'
updated_at = <Date 2019-04-07.19:04:59.497>
user = 'https://bugs.python.org/rhubarbdogx'

bugs.python.org fields:

activity = <Date 2019-04-07.19:04:59.497>
actor = 'jesse.farnham'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2019-03-11.01:51:16.936>
creator = 'rhubarbdog x'
dependencies = []
files = []
hgrepos = []
issue_num = 36259
keywords = []
message_count = 4.0
messages = ['337642', '337647', '339581', '339582']
nosy_count = 4.0
nosy_names = ['steven.daprano', 'xtreak', 'jesse.farnham', 'rhubarbdog x']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue36259'
versions = ['Python 2.7', 'Python 3.7', 'Python 3.8']