Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go version go1.9.2 windows/amd64

Does this issue reproduce with the latest release?

Yes, but only on my computer.
Which can not be produce in my anothrer computer.

What operating system and processor architecture are you using (go env)?

set GOARCH=amd64
set GOBIN=
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=C:\Users\SY-FuchunWang\go
set GORACE=
set GOROOT=C:\Go
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set GCCGO=gccgo
set CC=gcc
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0
set CXX=g++
set CGO_ENABLED=1
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config

What did you do?

Just run the following code.

package main

import (
	"log"
	"net/http"
)

func main() {
	http.HandleFunc("/", handler)
	log.Fatal(http.ListenAndServe(":8080", nil))
}

func handler(w http.ResponseWriter, r *http.Request) {
	h := w.(http.Hijacker)
	log.Println("calling hijack")
	c, _, err := h.Hijack()
	log.Println("hijack returned err=", err)
	c.Write([]byte("HTTP/1.1 200 OK\r\n\r\nOK"))
	c.Close()
}

What did you expect to see?

Not deadlock.

What did you see instead?

Here is my log console.
Hijack blocked ofen.

2017/12/29 14:28:52 calling hijack
2017/12/29 14:28:58 calling hijack
2017/12/29 14:29:02 calling hijack
2017/12/29 14:29:09 calling hijack
2017/12/29 14:29:09 hijack returned err= <nil>
2017/12/29 14:29:09 calling hijack
2017/12/29 14:29:09 hijack returned err= <nil>
2017/12/29 14:29:11 calling hijack
2017/12/29 14:29:12 calling hijack
2017/12/29 14:29:12 calling hijack

My system time is 2017/12/29 .