Hi,
It turns out you're running into a bit-error. In general, the two's complement of -2 ** (n-1) with the bit-length being limited to n bits is itself... No way around that. And integers don't set hardware exceptions so checking for errors like these is hard as well.
TL;DR: It's an error with how the integer is stored in memory and how you're running out of space.
Regards,
Hameer Abbasi
More like the eight bit twos complement of -128 is -128, bytes cannot represent 128. Matlab used to (still does?) solve this problem by returning 127 instead :) Basically, the data needs more precision. Returning an unsigned type would lead to it's own problems with unexpected promotions when the result was used. We could, I suppose, raise a warning, although that might be considered noisy. If you use `absolute` instead, you can specify the dtype.
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Chuck