}
	keyPEM := pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: keyDER})
	tmpl := &x509.Certificate{
		SerialNumber: big.NewInt(1),
		Subject:      pkix.Name{CommonName: "test"},
	}
	certDER, err := x509.CreateCertificate(rand.Reader, tmpl, tmpl, key.Public(), key)
	if err != nil {
		t.Fatal(err)
	}
	certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER})

func testServeFileContentType(t *testing.T, mode testMode) {
	const ctype = "icecream/chocolate"
	ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		switch r.FormValue("override") {
		case "1":
			w.Header().Set("Content-Type", ctype)
		case "2":
			// Explicitly inhibit sniffing.
			w.Header()["Content-Type"] = []string{}
		}
		ServeFile(w, r, "testdata/file")
	})).ts

}

// demangleType parses:
//
//	<type> ::= <builtin-type>
//	       ::= <function-type>
//	       ::= <class-enum-type>
//	       ::= <array-type>
//	       ::= <pointer-to-member-type>
//	       ::= <template-param>
//	       ::= <template-template-param> <template-args>
//	       ::= <substitution>
//	       ::= <CV-qualifiers> <type>
//	       ::= P <type>
//	       ::= R <type>

	lsym := sym.(*obj.LSym)
	for _, r := range lsym.R {
		if (r.Type == objabi.R_ADDR || r.Type == objabi.R_WEAKADDR) && int64(r.Off) == off {
			if strings.HasPrefix(r.Sym.Name, "type:") {
				// In case we're loading a type out of a dictionary, we need to record
				// that the containing function might put that type in an interface.
				// That information is currently recorded in relocations in the dictionary,

const gcBitsHeaderBytes = unsafe.Sizeof(gcBitsHeader{})

type gcBitsHeader struct {
	free uintptr // free is the index into bits of the next free byte.
	next uintptr // *gcBits triggers recursive type bug. (issue 14620)
}

type gcBitsArena struct {
	_ sys.NotInHeap
	// gcBitsHeader // side step recursive type bug (issue 14620) by including fields by hand.