diff --git a/src/pocketmine/Thread.php b/src/pocketmine/Thread.php
index c6b83d925..d8f1ec5e4 100644
--- a/src/pocketmine/Thread.php
+++ b/src/pocketmine/Thread.php
@@ -26,10 +26,38 @@ namespace pocketmine;
  */
 abstract class Thread extends \Thread{
 
+	/** @var \ClassLoader */
+	protected $classLoader;
+
+	public function getClassLoader(){
+		return $this->classLoader;
+	}
+
+	public function setClassLoader(\ClassLoader $loader = null){
+		if($loader === null){
+			$loader = Server::getInstance()->getLoader();
+		}
+		$this->classLoader = $loader;
+	}
+
+	public function registerClassLoader(){
+		if(!interface_exists("ClassLoader", false)){
+			require(\pocketmine\PATH . "src/spl/ClassLoader.php");
+			require(\pocketmine\PATH . "src/spl/BaseClassLoader.php");
+			require(\pocketmine\PATH . "src/pocketmine/CompatibleClassLoader.php");
+		}
+		if($this->classLoader !== null){
+			$this->classLoader->register(true);
+		}
+	}
+
 	public function start($options = PTHREADS_INHERIT_ALL){
 		ThreadManager::getInstance()->add($this);
 
 		if(!$this->isRunning() and !$this->isJoined() and !$this->isTerminated()){
+			if($this->getClassLoader() === null){
+				$this->setClassLoader();
+			}
 			return parent::start($options);
 		}
 
diff --git a/src/pocketmine/Worker.php b/src/pocketmine/Worker.php
index 7f65b6e0d..58ec885ec 100644
--- a/src/pocketmine/Worker.php
+++ b/src/pocketmine/Worker.php
@@ -26,10 +26,38 @@ namespace pocketmine;
  */
 abstract class Worker extends \Worker{
 
+	/** @var \ClassLoader */
+	protected $classLoader;
+
+	public function getClassLoader(){
+		return $this->classLoader;
+	}
+
+	public function setClassLoader(\ClassLoader $loader = null){
+		if($loader === null){
+			$loader = Server::getInstance()->getLoader();
+		}
+		$this->classLoader = $loader;
+	}
+
+	public function registerClassLoader(){
+		if(!interface_exists("ClassLoader", false)){
+			require(\pocketmine\PATH . "src/spl/ClassLoader.php");
+			require(\pocketmine\PATH . "src/spl/BaseClassLoader.php");
+			require(\pocketmine\PATH . "src/pocketmine/CompatibleClassLoader.php");
+		}
+		if($this->classLoader !== null){
+			$this->classLoader->register(true);
+		}
+	}
+
 	public function start($options = PTHREADS_INHERIT_ALL){
 		ThreadManager::getInstance()->add($this);
 
-		if(!$this->isRunning() and !$this->isJoined() and !$this->isTerminated() and !$this->isShutdown()){
+		if(!$this->isRunning() and !$this->isJoined() and !$this->isTerminated()){
+			if($this->getClassLoader() === null){
+				$this->setClassLoader();
+			}
 			return parent::start($options);
 		}
 
diff --git a/src/pocketmine/command/defaults/StatusCommand.php b/src/pocketmine/command/defaults/StatusCommand.php
index e73aae953..1f7ea19ff 100644
--- a/src/pocketmine/command/defaults/StatusCommand.php
+++ b/src/pocketmine/command/defaults/StatusCommand.php
@@ -23,7 +23,6 @@ namespace pocketmine\command\defaults;
 
 use pocketmine\command\CommandSender;
 use pocketmine\utils\TextFormat;
-use pocketmine\ThreadManager;
 
 class StatusCommand extends VanillaCommand{
 
diff --git a/src/pocketmine/entity/Effect.php b/src/pocketmine/entity/Effect.php
index ecd0b40c6..00fdb153f 100644
--- a/src/pocketmine/entity/Effect.php
+++ b/src/pocketmine/entity/Effect.php
@@ -180,17 +180,17 @@ class Effect{
 	public function canTick(){
 		switch($this->id){
 			case Effect::POISON:
-				if(($interval = 25 >> $this->amplifier) > 0){
+				if(($interval = (25 >> $this->amplifier)) > 0){
 					return ($this->duration % $interval) === 0;
 				}
 				return true;
 			case Effect::WITHER:
-				if(($interval = 50 >> $this->amplifier) > 0){
+				if(($interval = (50 >> $this->amplifier)) > 0){
 					return ($this->duration % $interval) === 0;
 				}
 				return true;
 			case Effect::REGENERATION:
-				if(($interval = 40 >> $this->amplifier) > 0){
+				if(($interval = (40 >> $this->amplifier)) > 0){
 					return ($this->duration % $interval) === 0;
 				}
 				return true;
diff --git a/src/pocketmine/entity/Living.php b/src/pocketmine/entity/Living.php
index b587a5975..37cb3b8a4 100644
--- a/src/pocketmine/entity/Living.php
+++ b/src/pocketmine/entity/Living.php
@@ -73,6 +73,15 @@ abstract class Living extends Entity implements Damageable{
 		//return $this->getLevel()->rayTraceBlocks(Vector3::createVector($this->x, $this->y + $this->height, $this->z), Vector3::createVector($entity->x, $entity->y + $entity->height, $entity->z)) === null;
 	}
 
+	public function heal($amount, EntityRegainHealthEvent $source){
+		parent::heal($amount, $source);
+		if($source->isCancelled()){
+			return;
+		}
+
+		$this->attackTime = 0;
+	}
+
 	public function attack($damage, EntityDamageEvent $source){
 		if($this->attackTime > 0 or $this->noDamageTicks > 0){
 			$lastCause = $this->getLastDamageCause();
diff --git a/src/pocketmine/inventory/CraftingManager.php b/src/pocketmine/inventory/CraftingManager.php
index 056bed28c..4abae9c04 100644
--- a/src/pocketmine/inventory/CraftingManager.php
+++ b/src/pocketmine/inventory/CraftingManager.php
@@ -273,7 +273,7 @@ class CraftingManager{
 			Item::IRON_BLOCK => Item::IRON_INGOT,
 			Item::DIAMOND_BLOCK => Item::DIAMOND,
 			Item::EMERALD_BLOCK => Item::EMERALD,
-			//Item::REDSTONE_BLOCK => Item::REDSTONE_DUST,
+			Item::REDSTONE_BLOCK => Item::REDSTONE_DUST,
 			Item::COAL_BLOCK => Item::COAL,
 			Item::HAY_BALE => Item::WHEAT,
 		];
diff --git a/src/pocketmine/scheduler/AsyncPool.php b/src/pocketmine/scheduler/AsyncPool.php
index 39f714203..a58aac9e9 100644
--- a/src/pocketmine/scheduler/AsyncPool.php
+++ b/src/pocketmine/scheduler/AsyncPool.php
@@ -46,7 +46,8 @@ class AsyncPool{
 
 		for($i = 0; $i < $this->size; ++$i){
 			$this->workerUsage[$i] = 0;
-			$this->workers[$i] = new AsyncWorker($server->getLoader());
+			$this->workers[$i] = new AsyncWorker;
+			$this->workers[$i]->setClassLoader($server->getLoader());
 			$this->workers[$i]->start();
 		}
 	}
diff --git a/src/pocketmine/scheduler/AsyncWorker.php b/src/pocketmine/scheduler/AsyncWorker.php
index 3b78e1eb0..40580ef8f 100644
--- a/src/pocketmine/scheduler/AsyncWorker.php
+++ b/src/pocketmine/scheduler/AsyncWorker.php
@@ -25,19 +25,8 @@ use pocketmine\Worker;
 
 class AsyncWorker extends Worker{
 
-	public $loader;
-	
-	public function __construct(\ClassLoader $loader){
-		$this->loader = $loader;
-	}
-	
 	public function run(){
-		if(!interface_exists("ClassLoader", false)){
-			require(\pocketmine\PATH . "src/spl/ClassLoader.php");
-			require(\pocketmine\PATH . "src/spl/BaseClassLoader.php");
-			require(\pocketmine\PATH . "src/pocketmine/CompatibleClassLoader.php");
-		}
-		$this->loader->register(true);
+		$this->registerClassLoader();
 
 		global $store;
 		$store = [];