我的 dicerolling 程序發生了一次奇怪的崩潰。它工作正常，但最后它總是說：致命錯誤：所有 goroutine 都處于休眠狀態 - 死鎖！goroutine 1 [chan 接收]: main.main() /t?rning.go:43 +0x746goroutine 6 [chan receive]: main.dice(0xc00003a0c0, 0xc00003a120, 0xc0000100a0) /t?rning.go:51 +0x106 created by main.main /t?rning.go:40 +0x59agoroutine 7 [chan receive]: main.dice(0xc00003a0c0, 0xc00003a120, 0xc0000100a0) /t?rning.go:51 +0x106 created by main.main /t?rning.go:41 +0x5d3 exit status 2package mainimport (    "fmt"    "sync"    "math/rand")type t?rning struct {    rubrik string    minTal, maxTal int}type t?rningsSvar struct {    rubrik string    svaret int}func main() {    var wg sync.WaitGroup    fmt.Println("Dags att kasta t?rningar")    var antal int    fmt.Println("Hur m?nga t?rningar vill du anv?nda?")    fmt.Scan(&antal)    job := make(chan t?rning, antal)    svar := make(chan t?rningsSvar, antal)    for i := 0; i < antal; i++ {        fmt.Println("Vad ska t?rning", i+1, "ha f?r rubrik?")        var text string        fmt.Scan(&text)        fmt.Println("Vad ska vara minsta v?rdet p? t?rningen?")        var minsta int        fmt.Scan(&minsta)        fmt.Println("Vad ska vara st?rsta v?rdet p? t?rningen?")        var st?rsta int        fmt.Scan(&st?rsta)        job <- t?rning{rubrik: text, minTal: minsta, maxTal: st?rsta}    }    go dice(job, svar, &wg)    go dice(job, svar, &wg)    wg.Wait()    for svaren := range svar {        fmt.Println("T?rning " + svaren.rubrik + " fick: ", svaren.svaret)    }}func dice(job chan t?rning, svar chan t?rningsSvar, wg *sync.WaitGroup) {    wg.Add(1)     for item := range job {        text := item.rubrik        min := item.minTal        max := item.maxTal        slump := (rand.Intn(max - min) + min)        svar <- t?rningsSvar{rubrik: text, svaret: slump}    }    wg.Done()}