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

[Inada Naoki]

Inada Naoki <songofacandy at gmail.com> added the comment:

Now PyGC_Head is 16byte on 64bit platform.
Maybe, should we just change obmalloc in Python 3.8?

How about 32bit platforms?
What can we do for Python 3.7 and 2.7?

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<https://bugs.python.org/issue27987>
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