ref: fd499b39fd02fa18c403a423e908bd39b1e8013d
dir: /test/occur.myr/
use std
/* checks that f is not an infinite type (ie, the type
doesn't exist within itself). If 'f' typechecked,
it's type would be:
f : (std.exit((-> (-> ... ad infinitum ...))))
*/
const f = {
std.exit(f)
}