Server crash - Binary::WriteLFloat() error

[kabluinc]

Issue description

Server is continuously crashing when a player joins. Crash dump below. Sorry if this has already been asked however I have tried with latest commit 902957c

Steps to reproduce the issue

Run server, player joins.

OS and versions

• PocketMine-MP: 1.6.2 dev 902957c
• PHP: 7.0.14
• Server OS: Windows 10
• Game version: PE 1.1.0.55

Crashdump, backtrace or other files

`
PocketMine-MP Crash Dump Sat Jun 3 18:31:01 BST 2017

Error: Argument 1 passed to pocketmine\utils\Binary::writeLFloat() must be of the type float, null given, called in phar://E:/UserFiles/LIAMG/GameServers/TC03428615845884033855301/PocketMine-MP.phar/src/pocketmine/utils/BinaryStream.php on line 160
File: /src/pocketmine/utils/Binary
Line: 320
Type: notice

Code:
[311] return round(self::readLFloat($str), $accuracy);
[312] }
[313]
[314] /**
[315] * Writes a 4-byte little-endian floating-point number.
[316] *
[317] * @param float $value
[318] * @return string
[319] /
[320] public static function writeLFloat(float $value) : string{
[321] return ENDIANNESS === self::BIG_ENDIAN ? strrev(pack("f", $value)) : pack("f", $value);
[322] }
[323]
[324] /*
[325] * Returns a printable floating-point number.
[326] *
[327] * @param float $value
[328] * @return string
[329] */
[330] public static function printFloat(float $value){

Backtrace:
#0 /src/pocketmine/utils/BinaryStream(160): pocketmine\utils\Binary::writeLFloat(NULL )
#1 /src/pocketmine/network/mcpe/protocol/DataPacket(354): pocketmine\utils\BinaryStream->putLFloat(NULL )
#2 /src/pocketmine/network/mcpe/protocol/AddEntityPacket(72): pocketmine\network\mcpe\protocol\DataPacket->putVector3f(NULL , NULL , NULL )
#3 /src/pocketmine/network/mcpe/RakLibInterface(193): pocketmine\network\mcpe\protocol\AddEntityPacket->encode(boolean)
#4 /src/pocketmine/Player(1081): pocketmine\network\mcpe\RakLibInterface->putPacket(pocketmine\Player Player(1), pocketmine\network\mcpe\protocol\AddEntityPacket object, boolean , boolean )
#5 /Slapper-master/src/slapper/entities/SlapperEntity(84): pocketmine\Player->dataPacket(pocketmine\network\mcpe\protocol\AddEntityPacket object)
#6 /src/pocketmine/Player(820): slapper\entities\SlapperEntity->spawnTo(pocketmine\Player Player(1))
#7 /src/pocketmine/level/Level(2378): pocketmine\Player->sendChunk(integer -5, integer 7, pocketmine\network\mcpe\protocol\BatchPacket object)
#8 /src/pocketmine/level/Level(2419): pocketmine\level\Level->sendChunkFromCache(integer -5, integer 7)
#9 /src/pocketmine/level/format/io/ChunkRequestTask(88): pocketmine\level\Level->chunkRequestCallback(integer -5, integer 7, pocketmine\network\mcpe\protocol\BatchPacket object)
#10 /src/pocketmine/scheduler/AsyncPool(158): pocketmine\level\format\io\ChunkRequestTask->onCompletion(pocketmine\Server object)
#11 /src/pocketmine/scheduler/ServerScheduler(339): pocketmine\scheduler\AsyncPool->collectTasks(boolean)
#12 /src/pocketmine/Server(2414): pocketmine\scheduler\ServerScheduler->mainThreadHeartbeat(integer 852)
#13 /src/pocketmine/Server(2182): pocketmine\Server->tick(boolean)
#14 /src/pocketmine/Server(2064): pocketmine\Server->tickProcessor(boolean)
#15 /src/pocketmine/Server(1646): pocketmine\Server->start(boolean)
#16 /src/pocketmine/PocketMine(501): pocketmine\Server->__construct(BaseClassLoader object, pocketmine\utils\MainLogger object, string phar://E:\UserFiles\LIAMG\GameServers\TC03428615845884033855301\PocketMine-MP.phar/, string E:\UserFiles\LIAMG\GameServers\TC03428615845884033855301, string E:\UserFiles\LIAMG\GameServers\TC03428615845884033855301\plugins)
#17 (1): require_once(string phar://E:/UserFiles/LIAMG/GameServers/TC03428615845884033855301/PocketMine-MP.phar/src/pocketmine/PocketMine.php)

PocketMine-MP version: 1.6.2dev #0 [Protocol 113; API 3.0.0-ALPHA5]
Git commit: 0000000000000000000000000000000000000000
uname -a: Windows NT NS306121 6.1 build 7601 (Windows Server 2008 R2 Standard Edition Service Pack 1) i586
PHP Version: 7.0.10
Zend version: 3.0.0
OS : WINNT, win`

[dktapps]

This is a Slapper issue. Are you using the latest version of Slapper?

[kabluinc]

Using latest commit on master branch. jojoe77777/Slapper@e1ab06b