err = en.WriteInt64(z.ActualSize)
	if err != nil {
		err = msgp.WrapError(err, "ActualSize")
		return
	}
	// write "mt"
	err = en.Append(0xa2, 0x6d, 0x74)
	if err != nil {
		return
	}
	err = en.WriteTime(z.ModTime)
	if err != nil {
		err = msgp.WrapError(err, "ModTime")
		return
	}
	if (zb0001Mask & 0x20) == 0 { // if not omitted
		// write "i"
		err = en.Append(0xa1, 0x69)
		if err != nil {

	if err != nil {
		err = msgp.WrapError(err, "DataDir")
		return
	}
	err = en.WriteBool(z.XLV1)
	if err != nil {
		err = msgp.WrapError(err, "XLV1")
		return
	}
	err = en.WriteTime(z.ModTime)
	if err != nil {
		err = msgp.WrapError(err, "ModTime")
		return
	}
	err = en.WriteInt64(z.Size)
	if err != nil {
		err = msgp.WrapError(err, "Size")
		return
	}

		err = msgp.WrapError(err, "NextCycle")
		return
	}
	// write "LastUpdate"
	err = en.Append(0xaa, 0x4c, 0x61, 0x73, 0x74, 0x55, 0x70, 0x64, 0x61, 0x74, 0x65)
	if err != nil {
		return
	}
	err = en.WriteTime(z.LastUpdate)
	if err != nil {
		err = msgp.WrapError(err, "LastUpdate")
		return
	}
	// write "SkipHealing"
	err = en.Append(0xab, 0x53, 0x6b, 0x69, 0x70, 0x48, 0x65, 0x61, 0x6c, 0x69, 0x6e, 0x67)

	rfw := &readFromWriter{}
	w := NewWriterSize(rfw, bufsize)

	const writeSize = 8
	if n, err := w.Write(input[:writeSize]); n != writeSize || err != nil {
		t.Errorf("w.Write(%v bytes) = %v, %v; want %v, nil", writeSize, n, err, writeSize)
	}
	n, err := w.ReadFrom(bytes.NewReader(input[writeSize:]))
	if wantn := len(input[writeSize:]); int(n) != wantn || err != nil {