[Python-Dev] PEP 538 warning at startup: please remove it (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Tue Jun 13 09:07:19 EDT 2017

On 13 June 2017 at 19:07, Victor Stinner <victor.stinner at gmail.com> wrote:

Ok, if you want to have a more concrete example of regression introduced by this warning, look at testtracemalloc failures on this FreeBSD buildbot: http://buildbot.python.org/all/builders/AMD64%20FreeBSD%20CURRENT%20Debug%203.x/builds/419/steps/test/logs/stdio

I expect that a lot of tests using stderr will be broken by this warning. I'm not interested to discuss if the CI is properly configured or not. The thing is the warning can easily be seen as a regression: the test pass on 3.6 on the same platform ;-)

Those failures aren't due to the successful coercion warning, they're due to the "Python 3.7 has dropped support for your ASCII-only platform" warning that the interpreter ends up emitting after coercion fails :)

You're already working on the more user-friendly solution to that case, by way of PEP 540 (and if we decide it's a more expedient interim solution, I'd be fine with switching the Py_WARN_ON_C_LOCALE config setting to "no" until you've had more time to work on that).

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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