golang b 代码
文件路径：/test/fixedbugs/issue42401.dir/b.go
/ Copyright 2020 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 (
_ "unsafe"
"./a"
)
/go:linkname s test/a.s
var s string
func main() {
if a.Get() != "a" {
panic("FAIL")
}
s = "b"
if a.Get() != "b" {
panic("FAIL")
}
}