today, when a Swift program exits due to precondition failure, it prints something like
đź’Ł Program crashed: Illegal instruction at 0x00005d6d19cf4117
this looks a lot like a “corruption” bug (like a misuse of Unmanaged
, or one of the known miscompilation modes), so i spent many hours today trying to isolate a suspected refcounting issue instead of realizing this was in fact a precondition
failure i had planted myself weeks earlier.
i understand the arguments about printing the error message, which i’ll link here for convenience:
but i feel like it would still be helpful if precondition failures at least indicated they originate from a precondition
call, instead of just printing Illegal instruction
.
are there reasons why precondition failures can’t identify themselves as precondition failures?