D_Captain

Okay recloning the repo worked and its not crashing, strange. Anyway, this might be a dumb question but would there be anything wrong with making getEntityStats return IEntityStats?

Huh,,,,weird. I guess I'll reclone my repo. Regarding the line, what's wrong with it?

https://github.com/D-Captain-WAIS/OPRL-Dev

public class OPRLMain { private static final Logger LOGGER = LogManager.getLogger(); public OPRLMain() { FMLJavaModLoadingContext.get().getModEventBus().addListener(this::setup); FMLJavaModLoadingContext.get().getModEventBus().addListener(this::enqueueIMC); FMLJavaModLoadingContext.get().getModEventBus().addListener(this::processIMC); FMLJavaModLoadingContext.get().getModEventBus().addListener(this::doClientStuff); MinecraftForge.EVENT_BUS.register(new OPRLKeybindings()); MinecraftForge.EVENT_BUS.register(new EntityBaseStatsCapability()); } private void setup(final FMLCommonSetupEvent event) { OPRLKeybindings.init(); OPRLCapabilities.init(); LOGGER.info("HELLO FROM PREINIT"); } private void doClientStuff(final FMLClientSetupEvent event) { // do something that can only be done on the client } private void enqueueIMC(final InterModEnqueueEvent event) { // some example code to dispatch IMC to another mod } private void processIMC(final InterModProcessEvent event) { // some example code to receive and process InterModComms from other mods } // You can use SubscribeEvent and let the Event Bus discover methods to call @SubscribeEvent public void onServerStarting(FMLServerStartingEvent event) { // do something when the server starts } // You can use EventBusSubscriber to automatically subscribe events on the contained class (this is subscribing to the MOD // Event bus for receiving Registry Events) @Mod.EventBusSubscriber(bus=Mod.EventBusSubscriber.Bus.MOD) public static class RegistryEvents { @SubscribeEvent public static void onBlocksRegistry(final RegistryEvent.Register<Block> blockRegistryEvent) { // register a new block here LOGGER.info("HELLO from Register Block"); } } @Mod.EventBusSubscriber(modid = APIConfig.PROJECT_ID) public class OPRLCapabilities { public static void init(){ EntityBaseStatsCapability.register(); } } Here you go, good sir

I am still trying to get familiar with the forge systems and cannot for the life of me figure out why my .getCapability() is returning null. Granted, it's like 7am and I've not slept so apologies if this is a dumb error. Any help would be appreciated, attached are the logs and relevant code (I think that's everything relevant anyway). SerializableCapabilityProvider public class SerializableCapabilityProvider <HANDLER> extends SimpleCapabilityProvider<HANDLER> implements ICapabilitySerializable<INBT> { public SerializableCapabilityProvider(final Capability<HANDLER> capability, @Nullable final Direction facing) { this(capability, facing, capability.getDefaultInstance()); } public SerializableCapabilityProvider(final Capability<HANDLER> capability, @Nullable final Direction facing, @Nullable final HANDLER instance) { super(capability, facing, instance); } @Nullable @Override public INBT serializeNBT() { final HANDLER instance = getInstance(); if (instance == null) { return null; } return getCapability().writeNBT(instance, getFacing()); } @Override public void deserializeNBT(final INBT nbt) { final HANDLER instance = getInstance(); if (instance == null) { return; } getCapability().readNBT(instance, getFacing(), nbt); } } SimpleCapabilityProvider public class SimpleCapabilityProvider <HANDLER> implements ICapabilityProvider { protected final Capability<HANDLER> capability; protected final Direction facing; protected final HANDLER instance; protected final LazyOptional<HANDLER> lazyOptional; public SimpleCapabilityProvider(final Capability<HANDLER> capability, @Nullable final Direction facing, @Nullable final HANDLER instance) { this.capability = capability; this.facing = facing; this.instance = instance; if (this.instance != null) { lazyOptional = LazyOptional.of(() -> this.instance); } else { lazyOptional = LazyOptional.empty(); } } @Override public <T> LazyOptional<T> getCapability(final Capability<T> capability, @Nullable final Direction facing) { return getCapability().orEmpty(capability, lazyOptional); } public final Capability<HANDLER> getCapability() { return capability; } @Nullable public Direction getFacing() { return facing; } @Nullable public final HANDLER getInstance() { return instance; } } My registering method and attaching methods public class EntityBaseStatsCapability { @CapabilityInject(IEntityStats.class) public static final Capability<IEntityStats> INSTANCE = null; private static final Direction DEFAULT_FACING = null; public static void register() { CapabilityManager.INSTANCE.register(IEntityStats.class, new Capability.IStorage<IEntityStats>() { @Override public INBT writeNBT(Capability<IEntityStats> capability, IEntityStats instance, Direction side) { CompoundNBT props = new CompoundNBT(); props.putInt("power", instance.getPower()); props.putLong("beli", instance.getBeli()); props.putInt("gold", instance.getGold()); props.putLong("bounty", instance.getBounty()); props.putString("race", instance.getRace()); props.putString("combatClass", instance.getCombatClass()); props.putString("meleeSpecialization", instance.getMeleeSpecialization()); props.putString("rangedSpecialization", instance.getRangedSpecialization()); props.putString("weatherSpecialization", instance.getWeatherSpecialization()); props.putString("unarmedSpecialization", instance.getUnarmedSpecialization()); props.putString("doctorSpecialization", instance.getDoctorSpecialization()); props.putLong("meleeExp", instance.getMeleeExp()); props.putLong("rangedExp", instance.getRangedExp()); props.putLong("weatherExp", instance.getWeatherExp()); props.putLong("unarmedExp", instance.getUnarmedExp()); props.putLong("doctorExp", instance.getDoctorExp()); props.putInt("meleePoints", instance.getMeleePoints()); props.putInt("rangedPoints", instance.getRangedPoints()); props.putInt("weatherPoints", instance.getWeatherPoints()); props.putInt("unarmedPoints", instance.getUnarmedPoints()); props.putInt("doctorPoints", instance.getDoctorPoints()); props.putString("faction", instance.getFaction()); props.putString("factionRank", instance.getFactionRank()); props.putLong("rankExp", instance.getRankExp()); return props; } @Override public void readNBT(Capability<IEntityStats> capability, IEntityStats instance, Direction side, INBT nbt) { CompoundNBT props = (CompoundNBT) nbt; instance.setPower(props.getInt("power")); instance.setBeli(props.getLong("beli")); instance.setGold(props.getInt("gold")); instance.setBounty(props.getLong("bounty")); instance.setRace(props.getString("race")); instance.setCombatClass(props.getString("combatClass")); instance.setMeleeSpecialization(props.getString("meleeSpecialization")); instance.setRangedSpecialization(props.getString("rangedSpecialization")); instance.setWeatherSpecialization(props.getString("weatherSpecialization")); instance.setUnarmedSpecialization(props.getString("unarmedSpecialization")); instance.setDoctorSpecialization(props.getString("doctorSpecialization")); instance.setMeleeExp(props.getLong("meleeExp")); instance.setRangedExp(props.getLong("rangedExp")); instance.setWeatherExp(props.getLong("weatherExp")); instance.setUnarmedExp(props.getLong("unarmedExp")); instance.setDoctorExp(props.getLong("doctorExp")); instance.setMeleePoints(props.getInt("meleePoints")); instance.setRangedPoints(props.getInt("rangedPoints")); instance.setWeatherPoints(props.getInt("weatherPoints")); instance.setUnarmedPoints(props.getInt("unarmedPoints")); instance.setDoctorPoints(props.getInt("doctorPoints")); instance.setFaction(props.getString("faction")); instance.setFactionRank(props.getString("factionRank")); instance.setRankExp(props.getLong("rankExp")); } }, () -> new EntityBaseStats(null)); } public static ICapabilityProvider createProvider(final IEntityStats entityStats) { return new SerializableCapabilityProvider<>(INSTANCE, DEFAULT_FACING, entityStats); } public static LazyOptional<IEntityStats> getEntityStats(final LivingEntity entity) { return entity.getCapability(INSTANCE, DEFAULT_FACING); } @Mod.EventBusSubscriber(modid = APIConfig.PROJECT_ID) private static class EventHandler { @SubscribeEvent public static void attachCapabilities(AttachCapabilitiesEvent<Entity> event) { if (event.getObject() == null) return; if (event.getObject() instanceof LivingEntity) { final EntityBaseStats entityStats = new EntityBaseStats((LivingEntity) event.getObject()); event.addCapability(new ResourceLocation(APIConfig.PROJECT_ID), createProvider(entityStats)); } } } } Crash Report [06:40:42] [Worker-Main-15/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:130]: ---- Minecraft Crash Report ---- // I let you down. Sorry :( Time: 15/12/20 6:40 AM Description: Saving entity NBT java.lang.NullPointerException: Saving entity NBT at taeda.OPRL.data.SerializableCapabilityProvider.serializeNBT(SerializableCapabilityProvider.java:31) ~[?:?] {re:classloading} at net.minecraftforge.common.capabilities.CapabilityDispatcher.serializeNBT(CapabilityDispatcher.java:127) ~[forge:?] {re:classloading} at net.minecraftforge.common.capabilities.CapabilityProvider.serializeCaps(CapabilityProvider.java:86) ~[forge:?] {re:classloading} at net.minecraft.entity.Entity.writeWithoutTypeId(Entity.java:1567) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.entity.Entity.writeUnlessRemoved(Entity.java:1493) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.entity.Entity.writeUnlessPassenger(Entity.java:1509) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.chunk.ChunkPrimer.addEntity(ChunkPrimer.java:219) ~[forge:?] {re:classloading} at net.minecraft.world.gen.WorldGenRegion.addEntity(WorldGenRegion.java:260) ~[forge:?] {re:classloading} at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:419) ~[?:1.8.0_271] {} at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:742) ~[?:1.8.0_271] {} at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580) ~[?:1.8.0_271] {} at net.minecraft.world.IServerWorld.func_242417_l(IServerWorld.java:10) ~[forge:?] {re:classloading} at net.minecraft.world.spawner.WorldEntitySpawner.performWorldGenSpawning(WorldEntitySpawner.java:372) ~[forge:?] {re:classloading} at net.minecraft.world.gen.NoiseChunkGenerator.func_230354_a_(NoiseChunkGenerator.java:626) ~[forge:?] {re:classloading} at net.minecraft.world.chunk.ChunkStatus.lambda$static$12(ChunkStatus.java:89) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.chunk.ChunkStatus$ISelectiveWorker.doWork(ChunkStatus.java:244) ~[forge:?] {re:classloading} at net.minecraft.world.chunk.ChunkStatus.doGenerationWork(ChunkStatus.java:198) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.server.ChunkManager.lambda$chunkGenerate$18(ChunkManager.java:541) ~[forge:?] {re:classloading} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading} at net.minecraft.world.server.ChunkManager.lambda$chunkGenerate$20(ChunkManager.java:539) ~[forge:?] {re:classloading} at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:966) ~[?:1.8.0_271] {} at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:940) ~[?:1.8.0_271] {} at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:456) ~[?:1.8.0_271] {} at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter.lambda$func_219069_a$1(ChunkTaskPriorityQueueSorter.java:44) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.DelegatedTaskExecutor.driveOne(DelegatedTaskExecutor.java:88) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.DelegatedTaskExecutor.driveWhile(DelegatedTaskExecutor.java:132) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.DelegatedTaskExecutor.run(DelegatedTaskExecutor.java:100) ~[forge:?] {re:classloading} at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1067) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1703) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:172) ~[?:1.8.0_271] {} A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- Head -- Thread: Worker-Main-15 Stacktrace: at taeda.OPRL.data.SerializableCapabilityProvider.serializeNBT(SerializableCapabilityProvider.java:31) ~[?:?] {re:classloading} at net.minecraftforge.common.capabilities.CapabilityDispatcher.serializeNBT(CapabilityDispatcher.java:127) ~[forge:?] {re:classloading} at net.minecraftforge.common.capabilities.CapabilityProvider.serializeCaps(CapabilityProvider.java:86) ~[forge:?] {re:classloading} -- Entity being saved -- Details: Entity Type: minecraft:sheep (net.minecraft.entity.passive.SheepEntity) Entity ID: 1 Entity Name: Sheep Entity's Exact location: -118.00, 70.00, 198.00 Entity's Block location: World: (-118,70,198), Chunk: (at 10,4,6 in -8,12; contains blocks -128,0,192 to -113,255,207), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511) Entity's Momentum: 0.00, 0.00, 0.00 Entity's Passengers: [] Entity's Vehicle: ~~ERROR~~ NullPointerException: null Stacktrace: at net.minecraft.entity.Entity.writeWithoutTypeId(Entity.java:1567) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.entity.Entity.writeUnlessRemoved(Entity.java:1493) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.entity.Entity.writeUnlessPassenger(Entity.java:1509) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.chunk.ChunkPrimer.addEntity(ChunkPrimer.java:219) ~[forge:?] {re:classloading} at net.minecraft.world.gen.WorldGenRegion.addEntity(WorldGenRegion.java:260) ~[forge:?] {re:classloading} at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:419) ~[?:1.8.0_271] {} at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:742) ~[?:1.8.0_271] {} at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580) ~[?:1.8.0_271] {} at net.minecraft.world.IServerWorld.func_242417_l(IServerWorld.java:10) ~[forge:?] {re:classloading} at net.minecraft.world.spawner.WorldEntitySpawner.performWorldGenSpawning(WorldEntitySpawner.java:372) ~[forge:?] {re:classloading} at net.minecraft.world.gen.NoiseChunkGenerator.func_230354_a_(NoiseChunkGenerator.java:626) ~[forge:?] {re:classloading} at net.minecraft.world.chunk.ChunkStatus.lambda$static$12(ChunkStatus.java:89) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.chunk.ChunkStatus$ISelectiveWorker.doWork(ChunkStatus.java:244) ~[forge:?] {re:classloading} at net.minecraft.world.chunk.ChunkStatus.doGenerationWork(ChunkStatus.java:198) ~[forge:?] {re:classloading,pl:accesstransformer:B} -- Chunk to be generated -- Details: Location: -8,12 Position hash: 55834574840 Generator: net.minecraft.world.gen.NoiseChunkGenerator@6fd409b Stacktrace: at net.minecraft.world.server.ChunkManager.lambda$chunkGenerate$18(ChunkManager.java:541) ~[forge:?] {re:classloading} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading} at net.minecraft.world.server.ChunkManager.lambda$chunkGenerate$20(ChunkManager.java:539) ~[forge:?] {re:classloading} at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:966) ~[?:1.8.0_271] {} at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:940) ~[?:1.8.0_271] {} at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:456) ~[?:1.8.0_271] {} at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter.lambda$func_219069_a$1(ChunkTaskPriorityQueueSorter.java:44) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.DelegatedTaskExecutor.driveOne(DelegatedTaskExecutor.java:88) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.DelegatedTaskExecutor.driveWhile(DelegatedTaskExecutor.java:132) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.DelegatedTaskExecutor.run(DelegatedTaskExecutor.java:100) ~[forge:?] {re:classloading} at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1067) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1703) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:172) ~[?:1.8.0_271] {} -- System Details -- Details: Minecraft Version: 1.16.4 Minecraft Version ID: 1.16.4 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_271, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 1267210720 bytes (1208 MB) / 1971847168 bytes (1880 MB) up to 3817865216 bytes (3641 MB) CPUs: 16 JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4096m ModLauncher: 8.0.6+85+master.325de55 ModLauncher launch target: fmluserdevclient ModLauncher naming: mcp ModLauncher services: /mixin-0.8.2.jar mixin PLUGINSERVICE /eventbus-3.0.5-service.jar eventbus PLUGINSERVICE /forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-launcher.jar object_holder_definalize PLUGINSERVICE /forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-launcher.jar runtime_enum_extender PLUGINSERVICE /accesstransformers-2.2.0-shadowed.jar accesstransformer PLUGINSERVICE /forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-launcher.jar capability_inject_definalize PLUGINSERVICE /forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-launcher.jar runtimedistcleaner PLUGINSERVICE /mixin-0.8.2.jar mixin TRANSFORMATIONSERVICE /forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-launcher.jar fml TRANSFORMATIONSERVICE FML: 35.1 Forge: net.minecraftforge:35.1.0 FML Language Providers: javafml@35.1 minecraft@1 Mod List: client-extra.jar |Minecraft |minecraft |1.16.4 |DONE |a1:d4:5e:04:4f:d3:d6:e0:7b:37:97:cf:77:b0:de:ad:4a:47:ce:8c:96:49:5f:0a:cf:8c:ae:b2:6d:4b:8a:3f forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.|Forge |forge |35.1.0 |DONE |NOSIGNATURE main |One Piece: Roger's Legacy |oprl |0.0.01 |DONE |NOSIGNATURE Crash Report UUID: f079221a-fc3d-457c-8053-600a7be078eb [06:40:42] [Server thread/FATAL] [minecraft/ThreadTaskExecutor]: Error executing task on Chunk source main thread executor for minecraft:overworld java.util.concurrent.CompletionException: net.minecraft.crash.ReportedException: Saving entity NBT at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273) ~[?:1.8.0_271] {} at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280) ~[?:1.8.0_271] {} at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:975) ~[?:1.8.0_271] {} at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:940) ~[?:1.8.0_271] {} at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:456) ~[?:1.8.0_271] {} at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter.lambda$func_219069_a$1(ChunkTaskPriorityQueueSorter.java:44) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.DelegatedTaskExecutor.driveOne(DelegatedTaskExecutor.java:88) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.DelegatedTaskExecutor.driveWhile(DelegatedTaskExecutor.java:132) ~[forge:?] {re:classloading} at net.minecraft.util.concurrent.DelegatedTaskExecutor.run(DelegatedTaskExecutor.java:100) ~[forge:?] {re:classloading} at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1067) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1703) ~[?:1.8.0_271] {} at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:172) ~[?:1.8.0_271] {} Caused by: net.minecraft.crash.ReportedException: Saving entity NBT at net.minecraft.world.server.ChunkManager.lambda$chunkGenerate$18(ChunkManager.java:552) ~[forge:?] {re:classloading} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading} at net.minecraft.world.server.ChunkManager.lambda$chunkGenerate$20(ChunkManager.java:539) ~[forge:?] {re:classloading} at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:966) ~[?:1.8.0_271] {} ... 11 more Caused by: java.lang.NullPointerException at taeda.OPRL.data.SerializableCapabilityProvider.serializeNBT(SerializableCapabilityProvider.java:31) ~[?:?] {re:classloading} at net.minecraftforge.common.capabilities.CapabilityDispatcher.serializeNBT(CapabilityDispatcher.java:127) ~[forge:?] {re:classloading} at net.minecraftforge.common.capabilities.CapabilityProvider.serializeCaps(CapabilityProvider.java:86) ~[forge:?] {re:classloading} at net.minecraft.entity.Entity.writeWithoutTypeId(Entity.java:1567) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.entity.Entity.writeUnlessRemoved(Entity.java:1493) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.entity.Entity.writeUnlessPassenger(Entity.java:1509) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.chunk.ChunkPrimer.addEntity(ChunkPrimer.java:219) ~[forge:?] {re:classloading} at net.minecraft.world.gen.WorldGenRegion.addEntity(WorldGenRegion.java:260) ~[forge:?] {re:classloading} at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:419) ~[?:1.8.0_271] {} at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:742) ~[?:1.8.0_271] {} at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580) ~[?:1.8.0_271] {} at net.minecraft.world.IServerWorld.func_242417_l(IServerWorld.java:10) ~[forge:?] {re:classloading} at net.minecraft.world.spawner.WorldEntitySpawner.performWorldGenSpawning(WorldEntitySpawner.java:372) ~[forge:?] {re:classloading} at net.minecraft.world.gen.NoiseChunkGenerator.func_230354_a_(NoiseChunkGenerator.java:626) ~[forge:?] {re:classloading} at net.minecraft.world.chunk.ChunkStatus.lambda$static$12(ChunkStatus.java:89) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.chunk.ChunkStatus$ISelectiveWorker.doWork(ChunkStatus.java:244) ~[forge:?] {re:classloading} at net.minecraft.world.chunk.ChunkStatus.doGenerationWork(ChunkStatus.java:198) ~[forge:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.server.ChunkManager.lambda$chunkGenerate$18(ChunkManager.java:541) ~[forge:?] {re:classloading} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading} at net.minecraft.world.server.ChunkManager.lambda$chunkGenerate$20(ChunkManager.java:539) ~[forge:?] {re:classloading} at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:966) ~[?:1.8.0_271] {} ... 11 more Exception: java.util.ConcurrentModificationException thrown from the UncaughtExceptionHandler in thread "Worker-Main-20" Exception: java.util.ConcurrentModificationException thrown from the UncaughtExceptionHandler in thread "Worker-Main-62" Exception: java.util.ConcurrentModificationException thrown from the UncaughtExceptionHandler in thread "Worker-Main-153" Process finished with exit code -1