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pypy: fix FFI definition of Py_Buffer #1737

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Jul 24, 2021
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davidhewitt
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Fixes #1736

Looks like PyPy has extra fields for the Py_Buffer struct - https://foss.heptapod.net/pypy/pypy/-/blob/branch/default/pypy/module/cpyext/parse/cpyext_object.h#L78

Needs a CHANGELOG entry and also tests (in pyo3-pytests, because this is PyPy) before this can be merged. Will write them later, got to go to work now! 💼

@oconnor663
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Confirmed, this fixes the crash on my box!

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@messense messense left a comment

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LGTM

@messense messense merged commit 1a0f46b into PyO3:main Jul 24, 2021
@davidhewitt davidhewitt deleted the pypy-buffer branch July 24, 2021 08:58
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PyBuffer::get leads to memory corruption under PyPy
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