package main

import (
    "fmt"
    "net/http"
    "net/http/httptest"
)

func main() {

    var i int
    for {
        i++
        fmt.Println(i)
        ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        }))
        resp, err := http.Get(ts.URL)
        if err != nil {
            fmt.Println("unexpected get failed", err)
            break
        }
        resp.Body.Close()

        ts.Close()

        resp, err = http.Get(ts.URL)
        if err == nil {
            resp.Body.Close()
            fmt.Println("unexpected get succeed")
            break
        }
    }
}