golang a 代码
文件路径：/test/fixedbugs/issue40252.dir/a.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 a
type I interface {
Func()
}
func Call() {
f := I.Func
f(nil)
}