Go TCPListener.SetDeadline not working

main.go

package main 

import (
	"net"
	"time"
)

func main() {
	addr, _ := net.ResolveTCPAddr("tcp", "127.0.0.1:31432")
	l, err := net.ListenTCP("tcp", addr)
	if err != nil {
		println(err.Error())
	}
	
	l.SetDeadline(time.Now().Add(2 * time.Second))
	_, err = l.AcceptTCP()
	if err != nil {
		println(err.Error())
	}
}

works on latest master(at least):
AcceptEx tcp 127.0.0.1:31432: i/o timeout