build for Python 3.8 is broken about zopetoolkit HOT 12 CLOSED

The following packages have failures:

• zope.i18nmessageid
• zope.security
• zope.hookable
• zope.password
• zope.index

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The zope.password failure is weird, and I cannot reproduce it locally with tox -e py38.

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I cannot reproduce the zope.hookable failure with tox -e py38 either.

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Surprise: I cannot reproduce the zope.security failure with tox -e py38 either.

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Same story with zope.index and tox -e py38. There's one interesting deprecation warning:

/home/mg/src/zopefoundation/zope.index/.tox/py38/lib/python3.8/site-packages/zope/index/text/okapiindex.py:347: DeprecationWarning: an integer is required (got type float). Implicit conversion to integers using __int__ is deprecated, and may be removed in a future version of Python.

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Same story with zope.i18nmessageid and tox -e py38: no failures on my machine.

I suppose Travis is using a more recent 3.8 nightly build?

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Nope: current CPython git master + tox -re py38 passes all the tests for zope.hookable, zope.password and zope.i18nmessageid.

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Oh, wait, zopetoolkit tests released versions and not git masters, so maybe we had actual failures that got fixed but not released?

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I'm unable to run bin/buildout on 3.8 because lxml's build fails (error: too few arguments to function ‘PyCode_New’). I get the same error with python3.8 -m pip install lxml.

It could be that my cython version is too old (0.29.2-2build1).

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Cython issue filed: cython/cython#2938

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Python 3.8 is currently green in TravisCI! 🎆

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Thank you all for fixing it.

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