Python 3.9 beta adding source to tree

[adamchainz]

Describe the bug

When adding 3.9.0-beta.4 (as announced in #20) to my project apig-wsgi (adamchainz/apig-wsgi#158), I got an error on 3.9 only from Pytest:

2020-07-17T11:06:44.2808745Z ==================================== ERRORS ====================================
2020-07-17T11:06:44.2809998Z _ ERROR collecting 9a5dbe51-7fe1-4ab4-89ee-1c8ead1d420a/lib/python3.9/test/test_capi.py _
...
2020-07-17T11:06:44.2816009Z E   AttributeError: 'builtin_function_or_method' object has no attribute '__dict__'

It looks like the Python 3.9 source tree is instaled inside my runner directory in a UUID-named directory, and pytest is searching that for tests.

I could tell pytest to not search that directory for tests, but I'm not sure there won't be other repercussions of the source tree being there for other tools. Not to mention this will probably affect any project using pytest.

Which version of the action are you using?

• v1
• v2
• Some other tag (such as v2.0.1 or master)

Environment

• self-hosted
• Linux
• Windows
• Mac

If applicable, please specify if you're using a container

Python Versions

As above

To Reproduce

As above

Run/Repo Url

adamchainz/apig-wsgi#158

Screenshots

n/a

Additional context
n/a

[konradpabjan]

This looks like a duplicate of #101 and #106

We're working on a fix. This effects all non-cached versions of Python that must be downloaded and installed during the run. If you're using cached versions that come preinstalled on our hosted runners (such as 3.8.3), this does not effect them.

[adamchainz]

Thank you. I've subscribed to the relevant issues.

[MaksimZhukov]

Hello @adamchainz !
We have provided a solution for this issue. Please see this issue for more details