Fix crash in 1.14.

arclight-common/src/main/java/io/izzel/arclight/common/bridge/world/server/ServerChunkProviderBridge.java

@@ -1,5 +1,9 @@
 package io.izzel.arclight.common.bridge.world.server;
 
+import net.minecraft.entity.EntityClassification;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.Chunk;
 import net.minecraft.world.server.ServerWorldLightManager;
 
 import java.io.IOException;
@@ -15,4 +19,6 @@ public interface ServerChunkProviderBridge {
     boolean bridge$isChunkLoaded(int x, int z);
 
     ServerWorldLightManager bridge$getLightManager();
+
+    void bridge$worldNaturalSpawn(EntityClassification classification, World worldIn, Chunk chunk, BlockPos pos);
 }

arclight-common/src/main/java/io/izzel/arclight/common/mixin/core/world/server/ServerChunkProviderMixin.java

@@ -24,7 +24,6 @@ import net.minecraft.world.server.ServerWorld;
 import net.minecraft.world.server.ServerWorldLightManager;
 import net.minecraft.world.server.TicketManager;
 import net.minecraft.world.server.TicketType;
-import net.minecraft.world.spawner.WorldEntitySpawner;
 import net.minecraft.world.storage.WorldInfo;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
@@ -175,7 +174,7 @@ public abstract class ServerChunkProviderMixin implements ServerChunkProviderBri
                                 if (entityclassification != EntityClassification.MISC && (!entityclassification.getPeacefulCreature() || this.spawnPassives) && (entityclassification.getPeacefulCreature() || this.spawnHostiles) && (!entityclassification.getAnimal() || flag2)) {
                                     int i1 = limit * l / field_217238_b;
                                     if (object2intmap.getInt(entityclassification) <= i1) {
-                                        WorldEntitySpawner.spawnEntitiesInChunk(entityclassification, this.world, chunk, blockpos);
+                                        this.bridge$worldNaturalSpawn(entityclassification, this.world, chunk, blockpos);
                                     }
                                 }
                             }

arclight-common/src/main/java/io/izzel/arclight/common/mixin/v1_15/world/server/ServerChunkProviderMixin_1_15.java

@@ -0,0 +1,20 @@
+package io.izzel.arclight.common.mixin.v1_15.world.server;
+
+import io.izzel.arclight.common.bridge.world.server.ServerChunkProviderBridge;
+import net.minecraft.entity.EntityClassification;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraft.world.server.ServerChunkProvider;
+import net.minecraft.world.server.ServerWorld;
+import net.minecraft.world.spawner.WorldEntitySpawner;
+import org.spongepowered.asm.mixin.Mixin;
+
+@Mixin(ServerChunkProvider.class)
+public abstract class ServerChunkProviderMixin_1_15 implements ServerChunkProviderBridge {
+
+    @Override
+    public void bridge$worldNaturalSpawn(EntityClassification classification, World worldIn, Chunk chunk, BlockPos pos) {
+        WorldEntitySpawner.spawnEntitiesInChunk(classification, (ServerWorld) worldIn, chunk, pos);
+    }
+}

arclight-common/src/main/resources/mixins.arclight.core.1_15.json

@@ -82,6 +82,7 @@
     "world.chunk.ChunkMixin_1_15",
     "world.dimension.DimensionTypeMixin_1_15",
     "world.gen.feature.structure.SwampHutPieceMixin_1_15",
+    "world.server.ServerChunkProviderMixin_1_15",
     "world.server.ServerMultiWorldMixin_1_15",
     "world.server.ServerWorldMixin_1_15",
     "world.server.TicketManagerMixin_1_15",

arclight-forge-1.14/src/main/java/io/izzel/arclight/impl/mixin/v1_14/core/world/server/ServerChunkProviderMixin_1_14.java

@@ -0,0 +1,19 @@
+package io.izzel.arclight.impl.mixin.v1_14.core.world.server;
+
+import io.izzel.arclight.common.bridge.world.server.ServerChunkProviderBridge;
+import net.minecraft.entity.EntityClassification;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraft.world.server.ServerChunkProvider;
+import net.minecraft.world.spawner.WorldEntitySpawner;
+import org.spongepowered.asm.mixin.Mixin;
+
+@Mixin(ServerChunkProvider.class)
+public abstract class ServerChunkProviderMixin_1_14 implements ServerChunkProviderBridge {
+
+    @Override
+    public void bridge$worldNaturalSpawn(EntityClassification classification, World worldIn, Chunk chunk, BlockPos pos) {
+        WorldEntitySpawner.performNaturalSpawning(classification, worldIn, chunk, pos);
+    }
+}

arclight-forge-1.14/src/main/resources/mixins.arclight.impl.core.1_14.json

@@ -80,6 +80,7 @@
     "world.chunk.ChunkMixin_1_14",
     "world.dimension.DimensionTypeMixin_1_14",
     "world.gen.feature.structure.SwampHutPieceMixin_1_14",
+    "world.server.ServerChunkProviderMixin_1_14",
     "world.server.TicketManagerMixin_1_14",
     "world.spawner.WorldEntitySpawnerMixin_1_14",
     "world.storage.MapDataMixin_1_14"