[go-nuts] After conn.Close, connections is still alive

[倪彦春]

I write a echo server as below：

package main

import (
   "io"
   "log"
   "net"
)

func main() {
   l, err := net.Listen("tcp", ":2000")
   checkErr(err)

   defer l.Close()

   for {
      conn, err := l.Accept()
      if err != nil {
         log.Fatal(err)
         continue
      }

      go func(c net.Conn) {
         io.Copy(c, c)
         c.Close()
      }(conn)
   }
}



func checkErr(err error) {
   if err != nil {
      panic(err)
   }
}


Then I use telnet to test:

➜  telnet localhost 2000
Trying ::1...
Connected to localhost.
Escape character is '^]'.
abc
abc
def
def

I don't understand why the connection at clinet side is not closed after 
`c.Close()` ？

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