Author petr.viktorin
Recipients corona10, petr.viktorin, shihai1991, tcaswell, vstinner
Date 2020-05-12.13:43:02
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So, the failure is expected. Python's ABI can change until the 3.9.0 final release, so wheels built for different commits can be incompatible.
This applies to alphas/betas as well, as you say.

There is the PEP 384 stable ABI, which is much stricter (and more limited), but sip doesn't use it -- its wheels are specific to cp36/cp37/cp38:

Thanks for testing, though! Perhaps we need to communicate better that for the alphas/betas, everything needs to be rebuilt.
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