[issue31619] Strange error when convert hexadecimal with underscores to int

[Stefan Krah]

Stefan Krah <stefan at bytereef.org> added the comment:

> We see if digits * bits_per_char + PyLong_SHIFT -1 overflows an int?

Yes, but the check is too late: UB can already occur in this calculation
and then all bets are off.


It looks like 'n' was Py_ssize_t in 2.7. :)

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nosy: +skrah

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31619>
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