ref: a64be799930f5f33d617f8e6933bfbcf5056080a
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 : (-> (-> (-> ... ad infinitum ...)))
*/
const f = {
-> f
}