Bug report

Bug description:

This is probably not an issue but here are the known "temporary" overflows:

// format = 'K'returnPyLong_FromUnsignedLongLong((long long)va_arg(*p_va,unsignedlong long));

Note thatva_arg(*p_va, unsigned long long) will be converted into an unsigned long long, and then into a long long, and then back to an unsigned long long. So if we were to have an overflow here, it shouldn't really matter. Indeed, takev = (1ULL << 63) + 2. We have:

unsigned long longv2=va_arg(*p_va,unsignedlong long);// v2 = 9223372036854775810long longv3= (long long)v2;// v3 = -9223372036854775806PyObject*v4=PyLong_FromUnsignedLongLong(v3);// v4 = 9223372036854775810 as PyObject as v3 was casted back to an unsigned long long

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-132909: handle overflow for 'K' format indo_mkvalue #132911
• [3.13] gh-132909: handle overflow for 'K' format indo_mkvalue (GH-132911) #132932