self-embedded struct allows to dereference nil

[cosmos72]

Another allegedly contrived - but valid - use of self-referencing types. After declaring

import "fmt"
type X struct { *X }
var x X

the call fmt.Println(x.X) should print nil - instead it prints [] - a very minor issue.

The real issue is that

fmt.Println(x.X.X)

should panic due to nil pointer dereference - instead it succeeds and prints <nil>

Go playground behaviour is to print <nil> then panic: https://play.golang.org/p/n04z_sZemno

[glycerine]

Thanks @cosmos72 !