api3/network Crash getAttribute()

[RompeCraneos]

Issue description

Crash:
30.03 23:04:50 [Server] Server thread/EMERGENCY An unrecoverable error has occurred and the server has crashed. Creating a crash dump
30.03 23:04:50 [Server] Server thread/CRITICAL Error: "Call to a member function getAttribute() on null" (EXCEPTION) in "/src/pocketmine/entity/Human" at line 103

Steps to reproduce the issue

Random Crash every 5 - 15 minutes

OS and versions

• PocketMine-MP: 1.6.2dev #0 [Protocol 105; API 3.0.0-ALPHA5]
• PHP: 7.0.15
• Server OS: Linux, linux
• Game version: PE/Win10

Crashdump, backtrace or other files

Error: Call to a member function getAttribute() on null
File: /src/pocketmine/entity/Human
Line: 103
Type: notice

Code:
[94] * @param string $str
[95] * @param string $skinId
[96] /
[97] public function setSkin($str, $skinId){
[98] $this->skin = $str;
[99] $this->skinId = $skinId;
[100] }
[101]
[102] public function getFood() : float{
[103] return $this->attributeMap->getAttribute(Attribute::HUNGER)->getValue();
[104] }
[105]
[106] /*
[107] * WARNING: This method does not check if full and may throw an exception if out of bounds.
[108] * Use {@link Human::addFood()} for this purpose
[109] *
[110] * @param float $new
[111] *
[112] * @throws \InvalidArgumentException
[113] */

Backtrace:
#0 /src/pocketmine/entity/Human(411): pocketmine\entity\Human->getFood(boolean)
#1 /src/pocketmine/Player(3681): pocketmine\entity\Human->saveNBT(boolean)
#2 /src/pocketmine/Server(2272): pocketmine\Player->save(boolean 1)
#3 /src/pocketmine/Server(2419): pocketmine\Server->doAutoSave(boolean)
#4 /src/pocketmine/Server(2152): pocketmine\Server->tick(boolean)
#5 /src/pocketmine/Server(2035): pocketmine\Server->tickProcessor(boolean)
#6 /src/pocketmine/Server(1655): pocketmine\Server->start(boolean)
#7 /src/pocketmine/PocketMine(493): pocketmine\Server->__construct(BaseClassLoader object, pocketmine\utils\MainLogger object, string phar:///home/minecraft/multicraft/servers/server1162/custom-phar.phar/, string /home/minecraft/multicraft/servers/server1162/, string /home/minecraft/multicraft/servers/server1162/plugins/)
#8 (1): require_once(string phar:///home/minecraft/multicraft/servers/server1162/custom-phar.phar/src/pocketmine/PocketMine.php)

[Sandertv]

FACEPALM - Could you please look at previous issues? This is like the fourth of these issues, and is already fixed in the latest commit.