diff --git a/.travis.yml b/.travis.yml
index adb6125b71..bdf5e55e5d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,19 @@
 language: php
 
 php:
- - 7.0
+ - 7.2
 
 before_script:
- - pecl install channel://pecl.php.net/pthreads-3.1.6
- - echo | pecl install channel://pecl.php.net/yaml-2.0.0
+# - pecl install channel://pecl.php.net/pthreads-3.1.6
+ - echo | pecl install channel://pecl.php.net/yaml-2.0.2
+ - git clone https://github.com/krakjoe/pthreads.git --depth=1
+ - cd pthreads
+ - phpize
+ - ./configure
+ - make
+ - make install
+ - cd ..
+ - echo "extension=pthreads.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
 
 script:
  - ./tests/travis.sh
diff --git a/src/pocketmine/PocketMine.php b/src/pocketmine/PocketMine.php
index b039ef2d43..865147692a 100644
--- a/src/pocketmine/PocketMine.php
+++ b/src/pocketmine/PocketMine.php
@@ -78,9 +78,9 @@ namespace pocketmine {
 	use pocketmine\wizard\SetupWizard;
 	use raklib\RakLib;
 
-	const VERSION = "1.6.2dev";
+	const VERSION = "1.7dev";
 	const API_VERSION = "3.0.0-ALPHA7";
-	const CODENAME = "Unleashed";
+	const CODENAME = "[REDACTED]";
 
 	/*
 	 * Startup code. Do not look at it, it may harm you.
@@ -89,8 +89,8 @@ namespace pocketmine {
 	 * Enjoy it as much as I did writing it. I don't want to do it again.
 	 */
 
-	if(version_compare("7.0", PHP_VERSION) > 0 or version_compare("7.1", PHP_VERSION) <= 0){
-		echo "[CRITICAL] You must use PHP 7.0" . PHP_EOL;
+	if(version_compare("7.2", PHP_VERSION) > 0){
+		echo "[CRITICAL] You must use PHP >= 7.2" . PHP_EOL;
 		echo "[CRITICAL] Please use the installer provided on the homepage." . PHP_EOL;
 		exit(1);
 	}
@@ -448,8 +448,8 @@ namespace pocketmine {
 		if(substr_count($pthreads_version, ".") < 2){
 			$pthreads_version = "0.$pthreads_version";
 		}
-		if(version_compare($pthreads_version, "3.1.5") < 0){
-			$logger->critical("pthreads >= 3.1.5 is required, while you have $pthreads_version.");
+		if(version_compare($pthreads_version, "3.1.7-dev") < 0){
+			$logger->critical("pthreads >= 3.1.7-dev is required, while you have $pthreads_version.");
 			++$errors;
 		}
 
@@ -534,7 +534,7 @@ namespace pocketmine {
 
 
 		if(\Phar::running(true) === ""){
-			$logger->warning("Non-packaged PocketMine-MP installation detected, do not use on production.");
+			$logger->warning("Non-packaged PocketMine-MP installation detected. Consider using a phar in production for better performance.");
 		}
 
 		ThreadManager::init();
diff --git a/src/pocketmine/Thread.php b/src/pocketmine/Thread.php
index 1f1be497cf..b6a4d2b62b 100644
--- a/src/pocketmine/Thread.php
+++ b/src/pocketmine/Thread.php
@@ -60,7 +60,7 @@ abstract class Thread extends \Thread{
 		}
 	}
 
-	public function start(int $options = PTHREADS_INHERIT_ALL){
+	public function start(?int $options = \PTHREADS_INHERIT_ALL){
 		ThreadManager::getInstance()->add($this);
 
 		if(!$this->isRunning() and !$this->isJoined() and !$this->isTerminated()){
diff --git a/src/pocketmine/Worker.php b/src/pocketmine/Worker.php
index 85e3dedf9a..f9ade50716 100644
--- a/src/pocketmine/Worker.php
+++ b/src/pocketmine/Worker.php
@@ -61,7 +61,7 @@ abstract class Worker extends \Worker{
 		}
 	}
 
-	public function start(int $options = PTHREADS_INHERIT_ALL){
+	public function start(?int $options = \PTHREADS_INHERIT_ALL){
 		ThreadManager::getInstance()->add($this);
 
 		if(!$this->isRunning() and !$this->isJoined() and !$this->isTerminated()){
diff --git a/src/pocketmine/item/ItemFactory.php b/src/pocketmine/item/ItemFactory.php
index efe0327092..f08561ff28 100644
--- a/src/pocketmine/item/ItemFactory.php
+++ b/src/pocketmine/item/ItemFactory.php
@@ -338,11 +338,13 @@ class ItemFactory{
 
 			if(defined(Item::class . "::" . strtoupper($b[0]))){
 				$item = self::get(constant(Item::class . "::" . strtoupper($b[0])), $meta);
-				if($item->getId() === Item::AIR and strtoupper($b[0]) !== "AIR"){
-					$item = self::get($b[0] & 0xFFFF, $meta);
+				if($item->getId() === Item::AIR and strtoupper($b[0]) !== "AIR" and is_numeric($b[0])){
+					$item = self::get(((int) $b[0]) & 0xFFFF, $meta);
 				}
+			}elseif(is_numeric($b[0])){
+				$item = self::get(((int) $b[0]) & 0xFFFF, $meta);
 			}else{
-				$item = self::get($b[0] & 0xFFFF, $meta);
+				$item = self::get(Item::AIR, 0, 0);
 			}
 
 			return $item;
diff --git a/src/pocketmine/level/generator/object/Object.php b/src/pocketmine/level/generator/object/PopulatorObject.php
similarity index 96%
rename from src/pocketmine/level/generator/object/Object.php
rename to src/pocketmine/level/generator/object/PopulatorObject.php
index 0abf2a3554..8714c0d89d 100644
--- a/src/pocketmine/level/generator/object/Object.php
+++ b/src/pocketmine/level/generator/object/PopulatorObject.php
@@ -27,6 +27,6 @@ declare(strict_types=1);
 namespace pocketmine\level\generator\object;
 
 
-abstract class Object{
+abstract class PopulatorObject{
 
 }
\ No newline at end of file
diff --git a/src/pocketmine/utils/MainLogger.php b/src/pocketmine/utils/MainLogger.php
index 686f68344d..8e97d61041 100644
--- a/src/pocketmine/utils/MainLogger.php
+++ b/src/pocketmine/utils/MainLogger.php
@@ -105,8 +105,8 @@ class MainLogger extends \AttachableThreadedLogger{
 		$this->send($message, \LogLevel::INFO, "INFO", TextFormat::WHITE);
 	}
 
-	public function debug($message){
-		if($this->logDebug === false){
+	public function debug($message, bool $force = false){
+		if($this->logDebug === false and !$force){
 			return;
 		}
 		$this->send($message, \LogLevel::DEBUG, "DEBUG", TextFormat::GRAY);
@@ -156,7 +156,7 @@ class MainLogger extends \AttachableThreadedLogger{
 		$errfile = \pocketmine\cleanPath($errfile);
 		$this->log($type, get_class($e) . ": \"$errstr\" ($errno) in \"$errfile\" at line $errline");
 		foreach(\pocketmine\getTrace(0, $trace) as $i => $line){
-			$this->debug($line);
+			$this->debug($line, true);
 		}
 	}
 
diff --git a/start.ps1 b/start.ps1
index ef3c1221f5..9c0cf318f4 100644
--- a/start.ps1
+++ b/start.ps1
@@ -1,6 +1,8 @@
-param (
+[CmdletBinding(PositionalBinding=$false)]
+param (
 	[string]$php = "",
-	[switch]$Loop = $false
+	[switch]$Loop = $false,
+	[string][Parameter(ValueFromRemainingArguments)]$extraPocketMineArgs
 )
 
 if($php -ne ""){
@@ -23,7 +25,7 @@ if(Test-Path "PocketMine-MP.phar"){
 }
 
 function StartServer{
-	$command = "powershell " + $binary + " " + $file + " --enable-ansi"
+	$command = "powershell " + $binary + " " + $file + " --enable-ansi " + $extraPocketMineArgs
 	iex $command
 }