Why do coverage reports always crash?

[voldemortX]

When I use:
pytest
It's absolutely fine.
However, if I add '--cov=whatever', Python just crashes.
I'm using stackless-python 3.6.6 on Windows 10.
Actually, even the old 'coverage' package doesn't work as well, so I'm not even sure that I should be asking about this here...
Anyways, I'll just submit an issue and hope for some luck.
I have 2 files in the same folder(main.py & test_main.py).
main.py:

def road(x, y):
    return 1

test_main.py:

from main import road


class TestModels(object):
    def setup_class(self):
        # Init
        print('hi')

    def teardown_class(self):
        print('haha')

    def test_exist(self):
        assert road(0, 0) == 1

[ionelmc]

What exactly does crashing mean? Please add details like traceback, command line, project layout, configuration etc. Ideally you'd post a small reproducing example.

[voldemortX]

It‘s like standard crashed crash? There is no traceback or anything(Can't add a picture here and the thing is actually in Chinese...)
If I "run pytest with coverage" in Pycharm it reports "Process finished with exit code -1073741819 (0xC0000005)", it's probably the same exit code for pytest-cov.
However in the case of pytest-cov, when I run "pytest" in command line it gives a coverage percentage of the test file itself automatically(But it does not report a percentage for the files that are being tested, which is what I actually need).
And I have been using this conda env for a very long time, it should be quite stable.

[voldemortX]

The project I'm working on is built by flask, but it behaves exactly the same as that 2-file layout above.

[ionelmc]

So it's something that only happens when you run pytest from pycharm?

I simply can't tell what the problem is from what you posted so far. You need to try to isolate the cause. Remove options, tools, packages and/or code till it stops reproducing.

[voldemortX]

Sorry for the troubles...
It turns out to be some sort of compatibility issue with package PyTorch
A default python 3.6.8 enviroment works fine.