Version 1.27.0_1 (from brew) crashed when opening url about rtv

[michael-lazar]

https://docs.python.org/3.8/library/multiprocessing.html#contexts-and-start-methods

Changed in version 3.8: On macOS, the spawn start method is now the default. The fork start method should be considered unsafe as it can lead to crashes of the subprocess. See bpo-33725.

It looks like you will need to either change the Process(target=open_url_silent, args=(url,)) arguments to be pickle-safe, or configure the multiprocessing module to go back to using forking by default for macOS.

I suggest opening an issue/PR in one of the rtv forks, or submitting a bug report to Homebrew (I don't know if they accept code patches).

[michael-lazar]

Brew runs a pip install command inside of the formula, so it ends up installing all of the python dependencies directly from the definition in the setup.py file.

https://github.com/Homebrew/homebrew-core/blob/master/Formula/rtv.rb

The test dependencies are not part of a normal installation and will only be installed if you explicitly specify them like this

pip install rtv[test]

[arosl]

I have the same issue with rtv from brew on macOS Catalina (10.15.2)

[yohannes]

@michael-lazar I think I am going to forego installing from brew and install it via source. Question is, looking at the setup.py file, can you confirm that these are the 11 dependencies that will be installed?

install_requires = [ 9 'beautifulsoup4', 10 'decorator', 11 'kitchen', 12 'requests >=2.4.0', # https://github.com/michael-lazar/rtv/issues/325 13 'six', 14 ] 15 16 tests_require = [ 17 'coveralls', 18 'pytest>=3.1.0', # Pinned for the ``pytest.param`` method 19 'coverage', 20 'mock', 21 'pylint', 22 'vcrpy', 23 ]

which is quite different from the dependencies if installed view brew:

gdbm [email protected] [email protected] readline sqlite xz

Can you help to enlighten the reason of the diff between the two?

[yohannes]

Thanks @michael-lazar for the pointer.