Hardware Design of x86

computers throw interrupt when you divide by 0 instead of returning NaN/Inf/MaxInt
Instructions left from early 80's
shift and rotates with more than 1 cycle latency
privilege rings
task segments

You're not gonna do arithmetic or something with these 'ints', anyway

That is only if you're closed-minded enough to think like that.

With 0 = success, having nonzero values be the number of errors encountered or something similarly useful is a good idea.