[Bug]: [ALPHA] Division by zero crash with ISA immediates

[altrag]

Discord Thread

https://discord.com/channels/828292123936948244/1330368647322931351

What happened?

I've created an instruction like this:

div %a:S16(immediate), %b:S16(immediate)
%c:S16 = %a / %b
cccccccc cccccccc

which immediately crashes if I write out something like div 9, 0, and prevents the level from being reloaded until I manually edit the .asm file (or I guess manually change the .isa). Obviously someone manually dividing by zero is not a normal situation (I ran across it just because I fat fingered the zero while doing some testing of the ISA syntax) but still shouldn't crash.

I also tried putting in my own protection:

safediv %a:S16(immediate), %b:S16(immediate)
%bits = 0 - popcount(%b)
!assert %bits >> 63 == 1 "Cannot divide by zero"
%c:S16 = %a / %b
cccccccc cccccccc

doesn't help - I guess it still tries to calculate the %c line no regardless of the assert.

Version

0.1357 Beta

What OSes are you seeing the problem on?

Windows

Relevant debug.log output, search next to the exectuable