fix: Location (setWorld)

core/src/main/java/mc/core/player/InMemoryPlayerManager.java

@@ -38,6 +38,7 @@ public class InMemoryPlayerManager implements PlayerManager, Runnable {
         player.setName(name);
         player.getLocation().setXYZ(defaultLocation);
         player.getLocation().setYawPitch(defaultLocation);
+        player.getLocation().setWorld(defaultLocation.getWorld());
         player.setSettings(new PlayerSettings());
 
         synchronized (lock) {

flat_world/src/main/java/mc/world/flat/FlatWorld.java

@@ -7,6 +7,7 @@ package mc.world.flat;
 import com.flowpowered.nbt.Tag;
 import lombok.Getter;
 import lombok.Setter;
+import lombok.extern.slf4j.Slf4j;
 import mc.core.EntityLocation;
 import mc.core.world.IWorldType;
 import mc.core.world.Region;
@@ -17,6 +18,7 @@ import mc.core.world.chunk.ChunkSection;
 import java.util.UUID;
 import java.util.stream.Stream;
 
+@Slf4j
 public class FlatWorld implements World {
 
     @Getter
@@ -26,9 +28,7 @@ public class FlatWorld implements World {
     @Setter
     private String name;
 
-    @Getter
-    @Setter
-    private EntityLocation spawn = new EntityLocation(0d, 6d, 0d, 0f, 0f, this);
+    private EntityLocation spawn;
     private ChunkSection chunkSection = new SimpleChunkSection();
 
     @Override
@@ -36,6 +36,22 @@ public class FlatWorld implements World {
         return WorldType.GENERAL;
     }
 
+    @Override
+    public EntityLocation getSpawn() {
+        if (this.spawn == null) {
+            log.warn("Spawn is not defined! Set spawn [0, 6, 0]");
+            this.spawn = new EntityLocation(0d, 6d, 0d, 0f, 0f, this);
+        }
+
+        return this.spawn;
+    }
+
+    @Override
+    public void setSpawn(EntityLocation location) {
+        this.spawn = location;
+        this.spawn.setWorld(this);
+    }
+
     @Override
     public ChunkSection getChunk(int x, int y, int z) {
         return chunkSection;

proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/handlers/PlayHandler.java

@@ -83,7 +83,7 @@ public class PlayHandler extends AbstractStateHandler implements PlayStateHandle
                 packet.getX(), packet.getY(), packet.getZ(),
                 player.getLocation().getYaw(),
                 player.getLocation().getPitch(),
-                null
+                player.getLocation().getWorld()
         ));
         EventBusGetter.INSTANCE.post(event);
     }