go leak

package main

import (
    "fmt"
    "os"
    "runtime"
    "time"
)

var routines = 800

func main() {
    printTime := func(format string, i ...interface{}) {
        fmt.Printf(fmt.Sprintf("[%s] %s", time.Now().Format(time.StampMilli), format), i...)
    }

    i := 0

    go func() {
        for {
            printTime("goroutines = %d; i = %d\n", runtime.NumGoroutine(), i)
            time.Sleep(time.Second * 2)
        }
    }()

    time.Sleep(time.Second * 5)

    printTime("create %d routines\n", routines)

    for ; i < routines; i++ {
        go func() {
            time.Sleep(time.Second * 5)
            i--
        }()
    }

    for i > 0 {
        time.Sleep(time.Second)
    }

    printTime("end of routines\n")
    time.Sleep(time.Second * 20)
    os.Exit(0)
}