Handle non-standard LevelDB chunk data

Author: Kazzuk

server/src/main/java/org/cloudburstmc/server/level/chunk/BlockStorage.java

@@ -194,7 +194,9 @@ public void readFromStorage(ByteBuf buffer) {
                     this.paletteIndex.put(state, this.palette.size());
                     this.palette.add(state);
                 } catch (Exception e) {
-                    log.throwing(e);
+                    log.warn("Failed to deserialize palette entry {}, substituting air", i, e);
+                    this.paletteIndex.put(AIR, this.palette.size());
+                    this.palette.add(AIR);
                 }
             }
         } catch (IOException e) {

server/src/main/java/org/cloudburstmc/server/level/provider/leveldb/LevelDBProvider.java

@@ -84,7 +84,7 @@ public CompletableFuture<CloudChunk> readChunk(ChunkBuilder chunkBuilder) {
                         | ((finalizationState[1] & 0xFF) << 8)
                         | ((finalizationState[2] & 0xFF) << 16)
                         | ((finalizationState[3] & 0xFF) << 24);
-                chunkBuilder.state(stateValue + 1);
+                chunkBuilder.state(Math.min(stateValue + 1, Chunk.STATE_FINISHED));
             }
 
             byte chunkVersion = versionValue[0];