interface convertible bug (2): nil underlying

[xushiwei]

The following program sample.gop triggers an unexpected result

import "runtime"

type Outer interface{ Inner }

type impl struct{}

func New() Outer { return &impl{} }

type Inner interface {
	DoStuff() error
}

func (a *impl) DoStuff() error {
	return nil
}

func main() {
	var outer Outer = New()
}

Expected result

compile passed

Got

nil underlying

Gop Version

gop v1.1.0-alpha1-256-gf3285c6 darwin/amd64

Additional Notes

No response