HTTP server closes connection under Go 1.4.3

main.go

package main

import (
	"io/ioutil"
	"log"
	"net/http"
)

func main() {
	log.SetFlags(log.LstdFlags | log.Lmicroseconds)

	log.Println("listening on 127.0.0.1:10000")
	err := http.ListenAndServe("127.0.0.1:10000", http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
		log.Printf("reading body")

		body, _ := ioutil.ReadAll(req.Body)

		log.Printf("read body: %s", string(body))

		// causes server to close connection on Go 1.4.3
		req.Body.Close()
	}))

	if err != nil {
		log.Fatal(err)
	}
}

Send a post body like this to trigger the connection close:

curl localhost:10000 -i -X POST -d "SDFF"