if err != nil {
			log.Fatal(err)
		}
	}
	for {
		ev, err := tr.ReadEvent()
		if err == io.EOF {
			break
		}
		if err != nil {
			log.Fatal(err)
		}
		if err := tw.WriteEvent(ev); err != nil {
			log.Fatal(err)
		}
	}
}

type traceReader interface {
	Version() version.Version
	ReadEvent() (raw.Event, error)
}

type traceWriter interface {
	WriteEvent(raw.Event) error

	// reject invalid traces.
	const testGetters = false

	f.Fuzz(func(t *testing.T, b []byte) {
		r, err := trace.NewReader(bytes.NewReader(b))
		if err != nil {
			return
		}
		for {
			ev, err := r.ReadEvent()
			if err != nil {
				break
			}

			if !testGetters {
				continue
			}
			// Make sure getters don't do anything that panics
			switch ev.Kind() {
			case trace.EventLabel:
				ev.Label()

}

// Version returns the version of the trace that we're reading.
func (r *Reader) Version() version.Version {
	return r.v
}

// ReadEvent reads and returns the next trace event in the byte stream.
func (r *Reader) ReadEvent() (Event, error) {
	evb, err := r.r.ReadByte()
	if err == io.EOF {
		return Event{}, io.EOF
	}
	if err != nil {
		return Event{}, err
	}

func main() {
	flag.Parse()

	r, err := trace.NewReader(os.Stdin)
	if err != nil {
		log.Fatal(err)
	}
	v := testtrace.NewValidator()
	for {
		ev, err := r.ReadEvent()
		if err == io.EOF {
			break
		}
		if err != nil {
			log.Fatal(err)
		}
		if *logEvents {
			log.Println(ev.String())
		}
		if err := v.Event(ev); err != nil {
			log.Fatal(err)
		}
	}

	defer f.Close()

	// Write out the trace.
	r, err := raw.NewReader(&trace)
	if err != nil {
		log.Fatalf("reading trace: %v", err)
	}
	w, err := raw.NewTextWriter(f, version.Current)
	for {
		ev, err := r.ReadEvent()
		if err == io.EOF {
			break
		}
		if err != nil {
			log.Fatalf("reading trace: %v", err)
		}
		if err := w.WriteEvent(ev); err != nil {
			log.Fatalf("writing trace: %v", err)
		}
	}

		}
	}
	return tr, nil
}

// Version returns the version of the trace that we're reading.
func (r *TextReader) Version() version.Version {
	return r.v
}

// ReadEvent reads and returns the next trace event in the text stream.
func (r *TextReader) ReadEvent() (Event, error) {
	line, err := r.nextLine()
	if err != nil {
		return Event{}, err
	}
	evStr, line := readToken(line)
	ev, ok := r.names[evStr]
	if !ok {

	if err != nil {
		return err
	}
	for {
		ev, err := tr.ReadEvent()
		if err == io.EOF {
			return nil
		} else if err != nil {
			return err
		}
		fmt.Println(ev.String())
	}
}

func debugRawEvents(trc io.Reader) error {
	rr, err := raw.NewReader(trc)
	if err != nil {
		return err
	}
	for {
		ev, err := rr.ReadEvent()
		if err == io.EOF {
			return nil
		} else if err != nil {

			defer f.Close()

			tr, err := trace.NewReader(f)
			if err != nil {
				t.Fatalf("failed to create reader: %s", err)
			}

			v := testtrace.NewValidator()
			v.Go121 = true
			for {
				ev, err := tr.ReadEvent()
				if err != nil {
					if err == io.EOF {
						break
					}
					t.Fatalf("couldn't read converted event: %s", err)
				}
				if err := v.Event(ev); err != nil {

	}
	var buf bytes.Buffer
	tw, err := raw.NewWriter(&buf, tr.Version())
	if err != nil {
		return nil, nil, fmt.Errorf("failed to create trace byte writer: %v", err)
	}
	for {
		ev, err := tr.ReadEvent()
		if err == io.EOF {
			break
		}
		if err != nil {
			return nil, nil, fmt.Errorf("malformed test %s: bad trace file: %v", testPath, err)
		}
		if err := tw.WriteEvent(ev); err != nil {

	type eventStats struct {
		typ   event.Type
		count int
		bytes int
	}
	var stats [256]eventStats
	for i := range stats {
		stats[i].typ = event.Type(i)
	}
	eventsRead := 0
	for {
		e, err := tr.ReadEvent()
		if err == io.EOF {
			break
		}
		if err != nil {
			return err
		}
		s := &stats[e.Ev]
		s.count++
		s.bytes += encodedSize(&e)
		eventsRead++
	}