httpanic.go

package main

import (
    "time"
    "net/http"
)

func panicLater() {
    time.Sleep(time.Second)
    panic("we dead now")
}

func handler(w http.ResponseWriter, r *http.Request) {
    go panicLater()
    w.Write([]byte("hi"))
}

func main() {
    http.ListenAndServe(":9000", http.HandlerFunc(handler))
}