[issue38079] _PyObject_VAR_SIZE should avoid arithmetic overflow

[Greg Price]

Greg Price <gnprice at gmail.com> added the comment:

(The tracker just linked GH-14838 to this issue because I mentioned it in a comment there, but it's not for this issue -- it's that recent fix for an 11-year-old bug in a callsite's overflow check.)

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38079>
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