golang在函数中改变slice值

package main

import (
    "fmt"
    "time"
)

func main() {
    registerChan:=make(chan string)

    go func(){
        registerChan<-"hi"
    }()
    go func(){
        registerChan<-"hello"
    }()

    schedule(registerChan)

}


func schedule(registerChan chan string){
    workers := []string{}
    go func(wkrs *[]string){
        for{
            wkr := <-registerChan 
            *wkrs = append(*wkrs,wkr)
            }
    }(&workers)
    time.Sleep(4)
    fmt.Println(workers,len(workers))
}