For the good.
;; golang wasm generator github.com/kpmy/tiss
(module
(type $t0
(func))
(func $fib
(param $x i64)
(result i64)
(local $i i64)
(return
(i64.const 0)))
(func $start
(type $t0)
(call $fib
(i64.const 0)))
(start $start))
not so pretty :(