testWriteHeaderAfterWrite(t, http1Mode, true)
}
func testWriteHeaderAfterWrite(t *testing.T, mode testMode, hijack bool) {
	var errorLog lockedBytesBuffer
	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		if hijack {
			conn, _, _ := w.(Hijacker).Hijack()
			defer conn.Close()
			conn.Write([]byte("HTTP/1.1 200 OK\r\nContent-Length: 6\r\n\r\nfoo"))

// Lookup returns the object in scope s with the given name if such an
// object exists; otherwise the result is nil.
func (s *Scope) Lookup(name string) Object {
	obj := resolve(name, s.elems[name])
	// Hijack Lookup for "any": with gotypesalias=1, we want the Universe to
	// return an Alias for "any", and with gotypesalias=0 we want to return
	// the legacy representation of aliases.
	//

// Lookup returns the object in scope s with the given name if such an
// object exists; otherwise the result is nil.
func (s *Scope) Lookup(name string) Object {
	obj := resolve(name, s.elems[name])
	// Hijack Lookup for "any": with gotypesalias=1, we want the Universe to
	// return an Alias for "any", and with gotypesalias=0 we want to return
	// the legacy representation of aliases.
	//