there was a decoder an not encode this makes the fuzzler flag it

proto/packet_test.go

@@ -25,7 +25,7 @@ func FuzzPlayPackets(f *testing.F) {
 		b1 := bytes.NewBuffer(b)
 		p, err := p.Decode(b1)
 		if err != nil {
-			t.Skipf("failed to decode %q because %v (partial %v)", b, err, p)
+			t.Skipf("failed to decode %q because \"%v\" (partial %v)", b, err, p)
 			return
 		}
 		if b1.Len() != 0 {

proto_generator/native_decoder.go

@@ -545,7 +545,7 @@ func (g *Generator) RegisterDecoderNatives() {
 		"bool": SimpleTypeDecoder,
 
 		"registryEntryHolder":      RegistryEntryHolderDecoder,
-		"registryEntryHolderSet":   RegistryEntryHolderSetDecoder,
+		"registryEntryHolderSet":   ToDoDecoder, // RegistryEntryHolderSetDecoder
 		"entityMetadataLoop":       ToDoDecoder,
 		"topBitSetTerminatedArray": ToDoDecoder,
 		"todo":                     ToDoDecoder,