Breaking changes in the C-API in PyPy 7.3.6
The changes merged in !826 (merged) have changed the ordering of fields in the PyDateTime_CAPI
struct.
This started triggering segfaults in CI runs for PyO3, e.g. this one: https://github.com/PyO3/pyo3/runs/3948446675?check_suite_focus=true
It's easy enough for us to fix our definitions - https://github.com/PyO3/pyo3/pull/1941, but this seems like an unintentional breaking change for a patch release.
In particular the reason I wanted to flag this here is that PyPy 7.3.5 and 7.3.6 compiled extensions share the same wheel tag pp37-pypy37_pp73
. Because of the breaking change to this C API, I think it's highly likely there's code using this C-API which has been uploaded to PyPI and was compiled for PyPy 3.7.5 (or older) and so will segfault when installed on PyPy 7.3.6.