fix TAG_List<TAG_Compound>

nbt/snbt_decode.go

@@ -159,23 +159,30 @@ func writeListOrArray(e *Encoder, d *decodeState, tagName string) error {
 	case scanBeginList: // TAG_List<TAG_List>
 	case scanBeginCompound: // TAG_List<TAG_Compound>
 		for {
-			d.scanWhile(scanSkipSpace)
+			if d.opcode == scanSkipSpace {
+				d.scanWhile(scanSkipSpace)
+			}
 			if d.opcode != scanBeginCompound {
 				return errors.New("different TagType in List")
 			}
 			writeCompoundPayload(e2, d)
 			count++
-			// read ',' or ']'
 			if d.opcode == scanSkipSpace {
 				d.scanWhile(scanSkipSpace)
 			}
+			// read ',' or ']'
 			d.scanNext()
+			if d.opcode == scanSkipSpace {
+				d.scanWhile(scanSkipSpace)
+			}
 			if d.opcode == scanEndValue {
 				break
 			}
 			if d.opcode != scanListValue {
 				panic(phasePanicMsg)
 			}
+			// read '{'
+			d.scanNext()
 		}
 		e.writeListHeader(TagCompound, tagName, count)
 		e.w.Write(buf.Bytes())

nbt/snbt_decode_test.go

@@ -38,7 +38,7 @@ func TestEncoder_WriteSNBT(t *testing.T) {
 	for i := range testCases {
 		buf.Reset()
 		if err := e.WriteSNBT(testCases[i].snbt); err != nil {
-			t.Error(err)
+			t.Errorf("Convert SNBT %q error: %v", testCases[i].snbt, err)
 			continue
 		}
 		want := testCases[i].nbt

nbt/snbt_scanner_test.go

@@ -9,7 +9,7 @@ func TestSNBT_checkScanCode(t *testing.T) {
 	//t.SkipNow()
 	var s scanner
 	s.reset()
-	for _, c := range []byte(`[I;1,2,3]`) {
+	for _, c := range []byte(`[{},{a:1b},{}]`) {
 		t.Logf("[%c] - %d", c, s.step(c))
 	}
 	t.Logf("[%c] - %d", ' ', s.eof())