close of closed channel when `Close` session in concurrent context about nano HOT 2 CLOSED

package main

import (
	"errors"
	"fmt"
	"sync/atomic"
	"time"
)

type test struct {
	status int32
	chDie  chan struct{}
}

func (t *test) Close() error {
	if atomic.LoadInt32(&t.status) > 0 {
		return errors.New("closed test")
	}

	// wait another gorontine enter block
	time.Sleep(time.Second)

	atomic.StoreInt32(&t.status, 1)

	// prevent closing closed channel
	select {
	case <-t.chDie:
		// expect
	default:
		close(t.chDie)
	}
	return nil
}

func main() {
	fmt.Println("Hello, 世界")
	t := &test{chDie: make(chan struct{})}

	go t.Close()
	go t.Close()

	time.Sleep(3 * time.Second)
}