// explore the space of decompressor behavior, since it can't see
// what the compressor is doing. But it's better than nothing.
func FuzzDecompressor(f *testing.F) {
	zstd := findZstd(f)

	for _, test := range tests {
		f.Add([]byte(test.uncompressed))
	}

	// Add some larger data, as that has more interesting compression.
	f.Add(bytes.Repeat([]byte("abcdefghijklmnop"), 256))

		if bigDataErr == nil {
			bigDataBytes = bytes.Repeat(bigDataBytes, 20)
		}
	})
	if bigDataErr != nil {
		t.Fatal(bigDataErr)
	}
	return bigDataBytes
}

func findZstd(t testing.TB) string {
	zstd, err := exec.LookPath("zstd")
	if err != nil {
		t.Skip("skipping because zstd not found")
	}
	return zstd
}

var (
	zstdBigOnce  sync.Once
	zstdBigBytes []byte

				// For well-formed input, the RST[0-7] restart marker follows
				// immediately. For corrupt input, call findRST to try to
				// resynchronize.
				if err := d.readFull(d.tmp[:2]); err != nil {
					return err
				} else if d.tmp[0] != 0xff || d.tmp[1] != expectedRST {
					if err := d.findRST(expectedRST); err != nil {
						return err
					}
				}
				expectedRST++
				if expectedRST == rst7Marker+1 {