return super.read();
        }

        @Override
        public int read(byte[] b, int off, int len) throws IOException {
            if (b == null) {
                throw new NullPointerException();
            } else if ((off < 0) || (off > b.length) || (len < 0)
                    || ((off + len) > b.length) || ((off + len) < 0)) {
                throw new IndexOutOfBoundsException();
            } else if (len == 0) {

        # To allow special characters in headers
        ignore_invalid_headers off;
        # Allow any size file to be uploaded.
        # Set to a value such as 1000m; to restrict file size to a specific value
        client_max_body_size 0;
        # To disable buffering
        proxy_buffering off;
        proxy_request_buffering off;

        location / {
            proxy_set_header Host $http_host;

        # To allow special characters in headers
        ignore_invalid_headers off;
        # Allow any size file to be uploaded.
        # Set to a value such as 1000m; to restrict file size to a specific value
        client_max_body_size 0;
        # To disable buffering
        proxy_buffering off;
        proxy_request_buffering off;

        location / {
            proxy_set_header Host $http_host;

	// otherwise distinguish between an explicit "off" and a UserCacheDir error.

	defaultDirOnce.Do(func() {
		defaultDir = cfg.Getenv("GOCACHE")
		if defaultDir != "" {
			defaultDirChanged = true
			if filepath.IsAbs(defaultDir) || defaultDir == "off" {
				return
			}
			defaultDir = "off"
			defaultDirErr = fmt.Errorf("GOCACHE is not an absolute path")
			return
		}

	return syscall.Read(int(fd), buf)
}

func closefd(fd uintptr) {
	syscall.Close(int(fd))
}

func preadn(fd uintptr, buf []byte, off int) error {
	whence := seekStart
	if off < 0 {
		whence = seekEnd
	}
	if _, err := syscall.Seek(int(fd), int64(off), whence); err != nil {
		return err
	}
	for len(buf) > 0 {
		m, err := syscall.Read(int(fd), buf)
		if m <= 0 {
			if err == nil {

        color.on(ansi)

        then:
        1 * ansi.fg(Color.MAGENTA)
        1 * ansi.a(Attribute.ITALIC)

        when: 'That color is turned off, it resets to default'
        color.off(ansi)

        then:
        1 * ansi.fg(Color.DEFAULT)
        1 * ansi.a(Attribute.ITALIC_OFF)

        when: 'A Style is overridden with a compound property'

! go test -shuffle=
stderr '(?s)invalid value "" for flag -shuffle: -shuffle argument must be "on", "off", or an int64: strconv.ParseInt: parsing "": invalid syntax'

! go test -shuffle=' '

package unix

import "syscall"

func PosixFallocate(fd int, off int64, size int64) error {
	// If successful, posix_fallocate() returns zero. It returns an error on failure, without
	// setting errno. See https://man.freebsd.org/cgi/man.cgi?query=posix_fallocate&sektion=2&n=1
	//
	// The padding 0 argument is needed because the ARM calling convention requires that if an
	// argument (off in this case) needs double-word alignment (8-byte), the NCRN (next core

	UsageLine: "go telemetry [off|local|on]",
	Short:     "manage telemetry data and settings",
	Long: `Telemetry is used to manage Go telemetry data and settings.

Telemetry can be in one of three modes: off, local, or on.

When telemetry is in local mode, counter data is written to the local file
system, but will not be uploaded to remote servers.

When telemetry is off, local counter data is neither collected nor uploaded.

	// Test PCToLine
	sym := tab.LookupFunc("main.linefrompc")
	wantLine := 0
	for pc := sym.Entry; pc < sym.End; pc++ {
		off := pc - text.Addr // TODO(rsc): should not need off; bug in 8g
		if textdat[off] == 255 {
			break
		}
		wantLine += int(textdat[off])
		t.Logf("off is %d %#x (max %d)", off, textdat[off], sym.End-pc)
		file, line, fn := tab.PCToLine(pc)
		if fn == nil {
			t.Errorf("failed to get line of PC %#x", pc)