include/boost/integer_traits.hpp:83:64: error: narrowing conversion of '255' from 'int' to 'char' [-Wnarrowing] about integer HOT 5 CLOSED

CHAR_MIN and CHAR_MAX must be defined to constants that fit in the range of char, so if there is narrowing happening then this must be a compiler or C standard library bug.

Can you verify that the constants have valid values, according to your target char definition?

from integer.

On my aarch64 system, I have echo -en '#include <climits>' | g++ -dM -x c++ -E - | grep CHAR_MAX$ which returns #define CHAR_MAX UCHAR_MAX

from integer.

Yes, but that's not what I'm asking. Is char signed or not? Do CHAR_MIN and CHAR_MAX actually fit in it?

from integer.

On Arm, char should be unsigned.

from integer.

Closing as this is a GCC12/python issue: https://bugs.python.org/issue46513

from integer.