In all the places (00-literals.ha) where rt::compile() is called with
void, we're expecting the compiler to exit in failure. Without this
patch, the "invalid" tests added in
https://lists.sr.ht/~sircmpwn/hare-dev/patches/51024 do not actually
cause the tests to fail. So I think somebody just made a little oopsie
during a refactor. Fortunately, all of the "invalid" tests are still
passing.