我對(duì)下面的代碼感到困惑，與，會(huì)改變程序行為有什么區(qū)別嗎？go run go run -race-race// test.gopackage mainimport "fmt"func main() {    c := make(chan string)    go func() {        for i := 0; i < 2; i++ {            c <- "hello there"        }    }()    for msg := range c {        fmt.Println(msg)    }}當(dāng) 時(shí)，結(jié)果為：go run test.gohello therehello therefatal error: all goroutines are asleep - deadlock!goroutine 1 [chan receive]:main.main()        /Users/donghui6/go/src/jd.com/iaas-sre/test/test.go:14 +0xf4exit status 2當(dāng) 時(shí)，程序?qū)炱穑缦滤荆篻o run -race test.gohello therehello there所以，誰能告訴我使用標(biāo)志時(shí)發(fā)生了什么-race