golang wait group channel

// https://stackoverflow.com/questions/70876451/channels-and-wait-groups-entering-deadlock
func main() {
    channel := make(chan string)
    var wg sync.WaitGroup
    for i := 0; i < 10; i++ {
        wg.Add(1)
        go performTest(channel, &wg, i)
    }

    // this is the trick
    go func() {
        wg.Wait()
        close(channel)
    }()

    for line := range channel {
        fmt.Print(line)
    }
}

func performTest(channel chan string, wg *sync.WaitGroup, i int) {
    defer wg.Done()
    // perform some work here
    result := fmt.Sprintf("Pretend result %d\n", i)
    channel <- result
}