code: func Fuzz(data []byte) int {
  	// uncompress some data
  	d, err := ioutil.ReadAll(lz4.NewReader(bytes.NewReader(data)))
  	if err != nil {
  		return 0
  	}
  
  	// got valid compressed data
  	// compress the uncompressed data
  	// and compare with the original input
  	buf := bytes.NewBuffer(nil)
  	zw := lz4.NewWriter(buf)
  	n, err := zw.Write(d)
  	if err != nil {
  		panic(err)
  	}
  	if n != len(d) {
  		panic("short write")
  	}
  	err = zw.Close()
  	if err != nil {
  		panic(err)
  	}
  
  	// uncompress the newly compressed data
  	ud, err := ioutil.ReadAll(lz4.NewReader(buf))
  	if err != nil {
  		panic(err)
  	}
  	if bytes.Compare(d, ud) != 0 {
  		panic("not equal")
  	}
  
  	return 1
  }
docs: // lz4.Reader fuzz function