package main

import (
	"log"
	"net"
)

func main() {
	// mutated concurrently, don't care
	buf := make([]byte, 8192) 

	l, err := net.Listen("tcp4", "127.0.0.1:9999")
	if err != nil {
		log.Fatal(err)
	}

	go func() {
		for {
			c, err := l.Accept()
			if err != nil {
				log.Fatal(err)
			}
			go func() {
				c.Write(buf)
				c.Close()
			}()
		}
	}()

	for {
		c, err := net.Dial("tcp4", "127.0.0.1:9999")
		if err != nil {
			log.Fatal(err)
		}
		go c.Read(buf)
		go c.Close()
	}
}