golang a 代码
文件路径：/test/fixedbugs/issue33866.dir/a.go
/ Copyright 2019 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 a
type Builder struct {
x int
}
func (tb Builder) Build() (out struct {
x interface{}
s string
}) {
out.x = nil
out.s = "hello!"
return
}