返回结果理论上不会是这个顺序

返回结果理论上不会是这个顺序，下面的返回应该是乱序的
比如我的代码

jobs := make(chan int, 5)
    done := make(chan bool)
    go func() {
        for {
            j, more := <-jobs
            if more {
                fmt.Println("received job", j)
            } else {
                fmt.Println("received all jobs")
                done <- true
                return
            }
        }
    }()
    for j := 1; j <= 3; j++ {
        jobs <- j
        fmt.Println("sent job", j)
    }
    close(jobs)
    fmt.Println("sent all jobs")

    <-done

我得到的结果

received job 1
sent job 1
sent job 2
sent job 3
sent all jobs
received job 2
received job 3
received all jobs