golang b 代码
文件路径：/test/fixedbugs/bug479.dir/b.go
/ Copyright 2013 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package main
import "./a"
type S3 struct {
p.S1
}
func main() {
var i interface{} = S3{}
_ = i
}