data race test

package main

import (
    "fmt"
    "time"
    "log"
    "net/http"
)

type MyHandler struct {}
func (*MyHandler)ServeHTTP(http.ResponseWriter, *http.Request) {
    fmt.Println("aaaa")
}

func main() {
    s := &http.Server{
        Addr:           ":8989",
        Handler:        &MyHandler{},
        ReadTimeout:    10 * time.Second,
        WriteTimeout:   10 * time.Second,
        MaxHeaderBytes: 1 << 20, 
    }   
    go func() {
        for {
            time.Sleep(time.Millisecond)
            s.ReadTimeout = time.Second
        }   
    }() 
    log.Fatal(s.ListenAndServe())
}