golang main 代码
文件路径：/test/typeparam/issue48306.dir/main.go
// Copyright 2021 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 S struct{}
func (*S) F() *S { return nil }
func main() {
var _ a.I[*S] = &S{}
}