json.Unmarshal can parse null into empty array

main.go

package main

import (
	"fmt"
	"encoding/json"
)

func main() {
	var (
		lst []string
		err error
	)
	err = json.Unmarshal(([]byte)("null"), &lst)
	fmt.Println(lst, err)
	
	err = json.Unmarshal(([]byte)("[]"), &lst)
	fmt.Println(lst, err)
}