Describe the bug
Twine's scheduled CI failed this morning, because the coverage percentage dropped below the threshold under Python 3.7 (GHA), with 1785 statements executed. The day before, it passed (GHA), with 1807 statements executed. There were no commits in between. The only difference that I'm aware of is the release of Coverage.py 7.0.2, but I don't see any red flags in the release notes.
To Reproduce
What version of Python are you using?
3.7 and 3.8
What version of coverage.py shows the problem? The output of coverage debug sys is helpful.
7.0.2
What versions of what packages do you have installed? The output of pip freeze is helpful.
% .tox/py37/bin/pip freeze
attrs==22.2.0
bleach==5.0.1
build==0.9.0
certifi==2022.12.7
charset-normalizer==2.1.1
commonmark==0.9.1
coverage==7.0.2
docutils==0.19
exceptiongroup==1.1.0
idna==3.4
importlib-metadata==6.0.0
importlib-resources==5.10.2
iniconfig==1.1.1
jaraco.classes==3.2.3
keyring==23.13.1
more-itertools==9.0.0
packaging==22.0
pep517==0.13.0
pkginfo==1.9.2
pluggy==1.0.0
pretend==1.0.9
Pygments==2.14.0
pytest==7.2.0
pytest-socket==0.5.1
readme-renderer==37.3
requests==2.28.1
requests-toolbelt==0.10.1
rfc3986==2.0.0
rich==13.0.0
six==1.16.0
tomli==2.0.1
twine @ file:///Users/bhrutledge/Dev/twine/.tox/.tmp/package/35/twine-4.0.3.dev21%2Bg89fba32.d20230103.tar.gz
typing_extensions==4.4.0
urllib3==1.26.13
webencodings==0.5.1
zipp==3.11.0
What code shows the problem?
https://github.com/pypa/twine/tree/89fba32c3cf56ff6b02c691154b3de7faf7def04
What commands did you run?
I'm able to reproduce this locally by running tox -e py37 and changing the coverage requirement in deps (e.g. to coverage==7.0.1 and coverage<7).
Expected behavior
The number of executed statements should be the same as previous versions.
Additional context
There's no change in statements from Coverage.py 6.5.0 to 7.0.1; both report 1807.
Also maybe worth noting that py37 has always seemed to be lower; py38 and greater seem to consistently execute 1856 statements, with no change across Coverage.py versions.
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