func TestHandlerFinishSkipBigContentLengthRead(t *testing.T) {
	setParallel(t)
	conn := newTestConn()
	conn.readBuf.WriteString(
		"POST / HTTP/1.1\r\n" +
			"Host: test\r\n" +
			"Content-Length: 9999999999\r\n" +
			"\r\n" + strings.Repeat("a", 1<<20))

	ls := &oneConnListener{conn}
	var inHandlerLen int
	go Serve(ls, HandlerFunc(func(rw ResponseWriter, req *Request) {
		inHandlerLen = conn.readBuf.Len()