[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[STINNER Victor]

STINNER Victor <victor.stinner at gmail.com> added the comment:

What matters when a Python object is allocated? The start of the PyObject structure, or the start of the PyGC_Head structure? Would it be possible to align the PyObject start?

The simplest option is to store data which needs to be aligned in a second memory block allocated by PyMem_AlignedAlloc().

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue27987>
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