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[Regression] `flake8-eradicate==1.0.0` conflicts with `wemake-python-styleguide` under GHA

See original GitHub issue

I don’t know if this is the right repo for this issue but my best guess is that it is.

I’m using pre-commit.com too and I have an upstream flake8 hook set up. I’ve added flake8-eradicate>=1.0.0 and wemake-python-styleguide there. That seemed to work fine in local envs of developers under different OSs. But in GitHub Actions CI/CD something shady started happening, something quite unobvious and hard to debug. I suspected that some flake8 plugins misbehave but I had no idea which ones.

flake8 started failing with violations that were supposed to be ignored in the config. It wasn’t really obvious in the CI because I used the wemake formatter and it somehow didn’t show the error messages, only some lines from code. Example: https://github.com/ansible/pylibssh/runs/1566735649?check_suite_focus=true#step:11:31

I had to break into those GHA runner VMs over SSH using https://github.com/marketplace/actions/debugging-with-tmate to gather more intel! Commenting out #format = wemake revealed another unexpected detail — almost all of those error messages had error codes prefixed with a letter they weren’t supposed to use — Z. Things like these came up:

tests/conftest.py:14:1: Z101 Found nested import "pylibsshext.session"
from pylibsshext.session import Session
^
tests/conftest.py:44:9: Z111 Found bare raise outside of except "raise"        raise
        ^
tests/conftest.py:122:9: Z110 Found wrong keyword "del"
        del ssh_session  # noqa: WPS420
        ^

I’ve commented out the flake8-eradicate>=1.0.0 line and it reported no violations when the version required by wemake-python-styleguide, which is flake8-eradicate (>=0.3,<0.4) (ref https://pypi.org/pypi/wemake-python-styleguide/json), was used.

I confirmed that when I tried to re-add flake8-eradicate>=1.0.0, it started throwing errors at me again. Then, I removed the wemake-python-styleguide line keeping flake8-eradicate>=1.0.0 in place and that worked too.

STR: fork https://github.com/ansible/pylibssh/tree/55b241a001c3621d68776f244a46650bfa5590f9, stick https://github.com/ansible/pylibssh/commit/b4f27eaac023ed8164f14128c85ce97b0e3fda1c there and connect over SSH to see the env.

N.B. I have no clue why but it’s only happening under the GitHub Actions VMs and not locally (checked under CPython 3.8 and 3.9).