Added some asserts

src/pocketmine/Player.php

@@ -2487,7 +2487,6 @@ class Player extends Human implements CommandSender, InventoryHolder, ChunkLoade
 							$pk = new EntityEventPacket();
 							$pk->eid = $this->getId();
 							$pk->event = EntityEventPacket::USE_ITEM;
-							$pk;
 							$this->dataPacket($pk);
 							Server::broadcastPacket($this->getViewers(), $pk);
 

src/pocketmine/Server.php

@@ -1518,6 +1518,9 @@ class Server{
 			}
 
 			define('pocketmine\DEBUG', (int) $this->getProperty("debug.level", 1));
+
+			ini_set('assert.exception', 1);
+
 			if($this->logger instanceof MainLogger){
 				$this->logger->setLogDebug(\pocketmine\DEBUG > 1);
 			}
@@ -1867,10 +1870,6 @@ class Server{
 	 * @throws \Exception
 	 */
 	public function dispatchCommand(CommandSender $sender, $commandLine){
-		if(!($sender instanceof CommandSender)){
-			throw new ServerException("CommandSender is not valid");
-		}
-
 		if($this->commandMap->dispatch($sender, $commandLine)){
 			return true;
 		}

src/pocketmine/entity/Entity.php

@@ -206,9 +206,8 @@ abstract class Entity extends Location implements Metadatable{
 
 
 	public function __construct(FullChunk $chunk, CompoundTag $nbt){
-		if($chunk === null or $chunk->getProvider() === null){
-			throw new ChunkException("Invalid garbage Chunk given to Entity");
-		}
+
+		assert($chunk !== null and $chunk->getProvider() !== null);
 
 		$this->timings = Timings::getEntityTimings($this);
 
@@ -240,6 +239,8 @@ abstract class Entity extends Location implements Metadatable{
 		);
 		$this->setMotion($this->temporalVector->setComponents($this->namedtag["Motion"][0], $this->namedtag["Motion"][1], $this->namedtag["Motion"][2]));
 
+		assert(!is_nan($this->x) and !is_infinite($this->x) and !is_nan($this->y) and !is_infinite($this->y) and !is_nan($this->z) and !is_infinite($this->z));
+
 		if(!isset($this->namedtag->FallDistance)){
 			$this->namedtag->FallDistance = new FloatTag("FallDistance", 0);
 		}
@@ -501,6 +502,8 @@ abstract class Entity extends Location implements Metadatable{
 	}
 
 	protected function initEntity(){
+		assert($this->namedtag instanceof CompoundTag);
+
 		if(isset($this->namedtag->ActiveEffects)){
 			foreach($this->namedtag->ActiveEffects->getValue() as $e){
 				$effect = Effect::getEffect($e["Id"]);

src/pocketmine/entity/Item.php

@@ -30,6 +30,7 @@ use pocketmine\item\Item as ItemItem;
 use pocketmine\nbt\NBT;
 
 
+use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\nbt\tag\ShortTag;
 use pocketmine\nbt\tag\StringTag;
 use pocketmine\network\Network;
@@ -70,6 +71,9 @@ class Item extends Entity{
 		if(isset($this->namedtag->Thrower)){
 			$this->thrower = $this->namedtag["Thrower"];
 		}
+
+		assert($this->namedtag->Item instanceof CompoundTag);
+
 		if(!isset($this->namedtag->Item)){
 			$this->close();
 			return;

src/pocketmine/level/Position.php

@@ -78,9 +78,7 @@ class Position extends Vector3{
 	 * @throws LevelException
 	 */
 	public function getSide($side, $step = 1){
-		if(!$this->isValid()){
-			throw new LevelException("Undefined Level reference");
-		}
+		assert($this->isValid());
 
 		return Position::fromObject(parent::getSide($side, $step), $this->level);
 	}

src/pocketmine/level/generator/Generator.php

@@ -118,15 +118,10 @@ abstract class Generator{
 	 * @return \SplFixedArray
 	 */
 	public static function getFastNoise2D(Noise $noise, $xSize, $zSize, $samplingRate, $x, $y, $z){
-		if($samplingRate === 0){
-			throw new \InvalidArgumentException("samplingRate cannot be 0");
-		}
-		if ($xSize % $samplingRate !== 0) {
-			throw new \InvalidArgumentCountException("xSize % samplingRate must return 0");
-		}
-		if ($zSize % $samplingRate !== 0) {
-			throw new \InvalidArgumentCountException("zSize % samplingRate must return 0");
-		}
+		assert($samplingRate !== 0, new \InvalidArgumentException("samplingRate cannot be 0"));
+
+		assert($xSize % $samplingRate === 0, new \InvalidArgumentCountException("xSize % samplingRate must return 0"));
+		assert($zSize % $samplingRate === 0, new \InvalidArgumentCountException("zSize % samplingRate must return 0"));
 
 		$noiseArray = new \SplFixedArray($xSize + 1);
 
@@ -173,24 +168,14 @@ abstract class Generator{
 	 * @return \SplFixedArray
 	 */
 	public static function getFastNoise3D(Noise $noise, $xSize, $ySize, $zSize, $xSamplingRate, $ySamplingRate, $zSamplingRate, $x, $y, $z){
-		if($xSamplingRate === 0){
-			throw new \InvalidArgumentException("xSamplingRate cannot be 0");
-		}
-		if($zSamplingRate === 0){
-			throw new \InvalidArgumentException("zSamplingRate cannot be 0");
-		}
-		if($ySamplingRate === 0){
-			throw new \InvalidArgumentException("ySamplingRate cannot be 0");
-		}
-		if ($xSize % $xSamplingRate !== 0) {
-			throw new \InvalidArgumentCountException("xSize % xSamplingRate must return 0");
-		}
-		if ($zSize % $zSamplingRate !== 0) {
-			throw new \InvalidArgumentCountException("zSize % zSamplingRate must return 0");
-		}
-		if ($ySize % $ySamplingRate !== 0) {
-			throw new \InvalidArgumentCountException("ySize % ySamplingRate must return 0");
-		}
+
+		assert($xSamplingRate !== 0, new \InvalidArgumentException("xSamplingRate cannot be 0"));
+		assert($zSamplingRate !== 0, new \InvalidArgumentException("zSamplingRate cannot be 0"));
+		assert($ySamplingRate !== 0, new \InvalidArgumentException("ySamplingRate cannot be 0"));
+
+		assert($xSize % $xSamplingRate === 0, new \InvalidArgumentCountException("xSize % xSamplingRate must return 0"));
+		assert($zSize % $zSamplingRate === 0, new \InvalidArgumentCountException("zSize % zSamplingRate must return 0"));
+		assert($ySize % $ySamplingRate === 0, new \InvalidArgumentCountException("ySize % ySamplingRate must return 0"));
 
 		$noiseArray = array_fill(0, $xSize + 1, array_fill(0, $zSize + 1, []));
 

src/pocketmine/nbt/tag/CompoundTag.php

@@ -62,6 +62,8 @@ class CompoundTag extends NamedTag implements \ArrayAccess{
 			}
 		}
 
+		assert(false, "Offset $offset not found");
+
 		return null;
 	}
 

src/pocketmine/resources/pocketmine.yml

@@ -84,6 +84,7 @@ network:
  upnp-forwarding: false
 
 debug:
+ #To enable assertion execution, set zend.assertions in your php.ini to 1
  #If > 1, it will show debug messages in the console
  level: 1
  #Enables /status, /gc

src/pocketmine/tile/Tile.php

@@ -111,9 +111,7 @@ abstract class Tile extends Position{
 	}
 
 	public function __construct(FullChunk $chunk, CompoundTag $nbt){
-		if($chunk === null or $chunk->getProvider() === null){
-			throw new ChunkException("Invalid garbage Chunk given to Tile");
-		}
+		assert($chunk !== null and $chunk->getProvider() !== null);
 
 		$this->timings = Timings::getTileEntityTimings($this);