inspect.getfile error names module instead of passed class

[flying-sheep]

BPO	37173
Nosy	@terryjreedy, @asvetlov, @flying-sheep, @miss-islington
PRs	bpo-37173: Show passed class in inspect.getfile error #13861 [3.8] bpo-37173: Show passed class in inspect.getfile error (GH-13861) #13913 [3.7] bpo-37173: Show passed class in inspect.getfile error (GH-13861) #13918

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2019-06-08.12:15:47.310>
created_at = <Date 2019-06-06.11:08:14.236>
labels = ['3.8', 'library', '3.9']
title = 'inspect.getfile error names module instead of passed class'
updated_at = <Date 2019-06-08.15:27:09.217>
user = 'https://github.com/flying-sheep'

bugs.python.org fields:

activity = <Date 2019-06-08.15:27:09.217>
actor = 'miss-islington'
assignee = 'none'
closed = True
closed_date = <Date 2019-06-08.12:15:47.310>
closer = 'asvetlov'
components = ['Library (Lib)']
creation = <Date 2019-06-06.11:08:14.236>
creator = 'flying sheep'
dependencies = []
files = []
hgrepos = []
issue_num = 37173
keywords = ['patch']
message_count = 7.0
messages = ['344799', '345018', '345032', '345033', '345034', '345043', '345050']
nosy_count = 4.0
nosy_names = ['terry.reedy', 'asvetlov', 'flying sheep', 'miss-islington']
pr_nums = ['13861', '13913', '13918']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue37173'
versions = ['Python 3.8', 'Python 3.9']

[flying-sheep]

Currently, inspect.getfile(str) will report nonsense:

>>> inspect.getfile(str)
TypeError: <module 'builtins' (built-in)> is a built-in class

[terryjreedy]

The correct message would be
"<class 'str'> is a built-in class"

We do not backport exception message changes unless 'buggy enough'. I asked on core-mentorship whether this fix qualifies.

[asvetlov]

I think landing the fix to 3.8 only is just fine

[miss-islington]

New changeset d407d2a by Miss Islington (bot) (Philipp A) in branch 'master':
bpo-37173: Show passed class in inspect.getfile error (GH-13861)
d407d2a

[miss-islington]

New changeset c5daae4 by Miss Islington (bot) in branch '3.8':
bpo-37173: Show passed class in inspect.getfile error (GH-13861)
c5daae4

[terryjreedy]

Right, 3.8 not being released yet makes it different.

[miss-islington]

New changeset 51c9cc7 by Miss Islington (bot) in branch '3.7':
bpo-37173: Show passed class in inspect.getfile error (GH-13861)
51c9cc7