c.r.setReadLimit(c.server.initialReadLimitSize())
	if c.lastMethod == "POST" {
		// RFC 7230 section 3 tolerance for old buggy clients.
		peek, _ := c.bufr.Peek(4) // ReadRequest will get err below
		c.bufr.Discard(numLeadingCRorLF(peek))
	}
	req, err := readRequest(c.bufr)
	if err != nil {
		if c.r.hitReadLimit() {
			return nil, errTooLarge
		}
		return nil, err
	}

	if !http1ServerSupportsRequest(req) {

	}()

	c, err := ln.Accept()
	if err != nil {
		t.Fatalf("Accept: %v", err)
	}
	t.Cleanup(func() {
		c.Close()
	})
	br := bufio.NewReader(c)
	_, err = ReadRequest(br)
	if err != nil {
		t.Fatalf("ReadRequest: %v", err)
	}
	test.conn = c
	test.reader = br
	t.Cleanup(func() {
		<-test.reqdone
		tr.CloseIdleConnections()
		got, _ := io.ReadAll(test.reader)

// Tests for https://golang.org/issue/900
func TestMuxRedirectLeadingSlashes(t *testing.T) {
	setParallel(t)
	paths := []string{"//foo.txt", "///foo.txt", "/../../foo.txt"}
	for _, path := range paths {
		req, err := ReadRequest(bufio.NewReader(strings.NewReader("GET " + path + " HTTP/1.1\r\nHost: test\r\n\r\n")))
		if err != nil {
			t.Errorf("%s", err)
		}
		mux := NewServeMux()
		resp := httptest.NewRecorder()