Unexported struct fields are unsupported

[mvertes]

The following valid Go code fails with gno:

package main

import "fmt"

type test struct {
	v interface{}
	s string
}

type T struct {
	name string
}

func main() {
    t := []test{
	{
	    v: []interface{}{
		T{"hello"},
	    },
	    s: "world",
	},
    }
    fmt.Println(t)
}

// Output:
// [{[{hello}] world}]

[thehowl]

In Printf.

Duplicate: #1155. See-also #1361