Possible fix for #1661

src/pocketmine/level/Level.php

@@ -1706,10 +1706,6 @@ class Level implements ChunkManager, Metadatable{
 			$entity->kill();
 		}
 
-		if(($chunk = $this->getChunk($entity->chunkX, $entity->chunkZ)) instanceof FullChunk){
-			$chunk->removeEntity($entity);
-		}
-
 		unset($this->entities[$entity->getID()]);
 	}
 
@@ -1749,9 +1745,7 @@ class Level implements ChunkManager, Metadatable{
 		if($tile->getLevel() !== $this){
 			throw new \RuntimeException("Invalid Tile level");
 		}
-		if($this->isChunkLoaded($tile->chunk->getX(), $tile->chunk->getZ())){
+
-			$this->getChunk($tile->chunk->getX(), $tile->chunk->getZ(), true)->removeTile($tile);
-		}
 		unset($this->tiles[$tile->getID()]);
 	}
 

src/pocketmine/level/format/generic/BaseFullChunk.php

@@ -267,7 +267,14 @@ abstract class BaseFullChunk implements FullChunk{
 		if($save === true){
 			$level->saveChunk($this->getX(), $this->getZ());
 		}
-		if($this->getProvider()->unloadChunk($this->getX(), $this->getZ(), $safe)){
+		if($safe === true){
+			foreach($this->getEntities() as $entity){
+				if($entity instanceof Player){
+					return false;
+				}
+			}
+		}
+
 		foreach($this->getEntities() as $entity){
 			if($entity instanceof Player){
 				continue;
@@ -277,7 +284,7 @@ abstract class BaseFullChunk implements FullChunk{
 		foreach($this->getTiles() as $tile){
 			$tile->close();
 		}
-		}
+		return true;
 	}
 
 	public function getBlockIdArray(){

src/pocketmine/level/format/mcregion/McRegion.php

@@ -183,6 +183,7 @@ class McRegion extends BaseLevelProvider{
 
 		if($chunk instanceof FullChunk){
 			$this->chunks[$index] = $chunk;
+			return true;
 		}else{
 			return false;
 		}
@@ -190,26 +191,7 @@ class McRegion extends BaseLevelProvider{
 
 	public function unloadChunk($x, $z, $safe = true){
 		$chunk = $this->getChunk($x, $z, false);
-		if($chunk instanceof FullChunk){
+		if($chunk instanceof FullChunk and $chunk->unload(false, $safe)){
-			if($safe === true){
-				foreach($chunk->getEntities() as $entity){
-					if($entity instanceof Player){
-						return false;
-					}
-				}
-			}
-
-			foreach($chunk->getEntities() as $entity){
-				if($entity instanceof Player){
-					continue;
-				}
-				$entity->close();
-			}
-
-			foreach($chunk->getTiles() as $tile){
-				$tile->close();
-			}
-
 			$this->chunks[$index = Level::chunkHash($x, $z)] = null;
 
 			unset($this->chunks[$index]);

src/pocketmine/tile/Chest.php

@@ -43,7 +43,7 @@ class Chest extends Spawnable implements InventoryHolder, Container{
 	protected $doubleInventory = null;
 
 	public function __construct(FullChunk $chunk, Compound $nbt){
-		$nbt["id"] = Tile::CHEST;
+		$nbt->id = new String("id", Tile::CHEST);
 		parent::__construct($chunk, $nbt);
 		$this->inventory = new ChestInventory($this);
 

src/pocketmine/tile/Furnace.php

@@ -32,6 +32,7 @@ use pocketmine\nbt\tag\Byte;
 use pocketmine\nbt\tag\Compound;
 use pocketmine\nbt\tag\Enum;
 use pocketmine\nbt\tag\Short;
+use pocketmine\nbt\tag\String;
 use pocketmine\network\protocol\ContainerSetDataPacket;
 
 class Furnace extends Tile implements InventoryHolder, Container{
@@ -39,7 +40,7 @@ class Furnace extends Tile implements InventoryHolder, Container{
 	protected $inventory;
 
 	public function __construct(FullChunk $chunk, Compound $nbt){
-		$nbt["id"] = Tile::FURNACE;
+		$nbt->id = new String("id", Tile::FURNACE);
 		parent::__construct($chunk, $nbt);
 		$this->inventory = new FurnaceInventory($this);
 

src/pocketmine/tile/Sign.php

@@ -29,7 +29,7 @@ use pocketmine\nbt\tag\String;
 class Sign extends Spawnable{
 
 	public function __construct(FullChunk $chunk, Compound $nbt){
-		$nbt["id"] = Tile::SIGN;
+		$nbt->id = new String("id", Tile::SIGN);
 		if(!isset($nbt->Text1)){
 			$nbt->Text1 = new String("Text1", "");
 		}

src/pocketmine/tile/Tile.php

@@ -31,6 +31,7 @@ use pocketmine\level\format\FullChunk;
 use pocketmine\level\Level;
 use pocketmine\level\Position;
 use pocketmine\nbt\tag\Compound;
+use pocketmine\nbt\tag\Int;
 
 abstract class Tile extends Position{
 	const SIGN = "Sign";
@@ -88,9 +89,9 @@ abstract class Tile extends Position{
 	}
 
 	public function saveNBT(){
-		$this->namedtag["x"] = $this->x;
+		$this->namedtag->x = new Int("x", $this->x);
-		$this->namedtag["y"] = $this->y;
+		$this->namedtag->y = new Int("y", $this->y);
-		$this->namedtag["z"] = $this->z;
+		$this->namedtag->z = new Int("z", $this->z);
 	}
 
 	public function onUpdate(){