Game Crash

Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
[14:34:45] [Client thread/INFO]: Setting user: wmontoza
[14:34:45] [Client thread/INFO]: (Session ID is token:8dc940778adf485da9827870e1a2545d:e48219d527f1434c805be183f53d676e)
[14:34:47] [Client thread/INFO]: LWJGL Version: 2.9.1
[14:34:48] [Client thread/INFO]: Reloading ResourceManager: Default

Starting up SoundSystem...
[14:34:48] [Client thread/WARN]: File minecraft:sounds/mob/ghast/fireball.ogg does not exist, cannot add it to event minecraft:item.fireCharge.use
Initializing LWJGL OpenAL
    (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
OpenAL initialized.

[14:34:49] [Sound Library Loader/INFO]: Sound engine started
[14:34:50] [Client thread/INFO]: Created: 512x512 textures-atlas
[14:34:51] [Client thread/ERROR]: ########## GL ERROR ##########
[14:34:51] [Client thread/ERROR]: @ Post startup
[14:34:51] [Client thread/ERROR]: 1281: Invalid value
[14:34:51] [Client thread/ERROR]: ########## GL ERROR ##########
[14:34:51] [Client thread/ERROR]: @ Pre render
[14:34:51] [Client thread/ERROR]: 1281: Invalid value
[14:34:57] [Server thread/INFO]: Starting integrated minecraft server version 14w31a
[14:34:57] [Server thread/INFO]: Generating keypair
[14:34:58] [Server thread/INFO]: Preparing start region for level 0
[14:34:59] [Server thread/INFO]: Preparing spawn area: 52%
[14:34:59] [Server thread/INFO]: Changing view distance to 16, from 10
[14:34:59] [Server thread/INFO]: wmontoza[local:E:178ed6fa] logged in with entity id 120 at (-1100.8611314722466, 63.0, 1281.4993801671064)
[14:34:59] [Server thread/INFO]: wmontoza entrou no jogo
[14:35:01] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2119ms behind, skipping 42 tick(s)
[14:35:12] [Server thread/ERROR]: Encountered an unexpected exception
u: Ticking entity
	at net.minecraft.server.MinecraftServer.y(SourceFile:610) ~[14w31a.jar:?]
	at net.minecraft.server.MinecraftServer.x(SourceFile:530) ~[14w31a.jar:?]
	at cxc.x(SourceFile:155) ~[14w31a.jar:?]
	at net.minecraft.server.MinecraftServer.run(SourceFile:446) [14w31a.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_11]
Caused by: java.lang.NullPointerException
	at bou.a(SourceFile:77) ~[14w31a.jar:?]
	at bou.a(SourceFile:65) ~[14w31a.jar:?]
	at boy.a(SourceFile:77) ~[14w31a.jar:?]
	at boy.a(SourceFile:37) ~[14w31a.jar:?]
	at boy.a(SourceFile:22) ~[14w31a.jar:?]
	at aay.a(SourceFile:97) ~[14w31a.jar:?]
	at zj.a(SourceFile:49) ~[14w31a.jar:?]
	at zb.a(SourceFile:72) ~[14w31a.jar:?]
	at xl.bE(SourceFile:446) ~[14w31a.jar:?]
	at xk.l(SourceFile:1430) ~[14w31a.jar:?]
	at xl.l(SourceFile:316) ~[14w31a.jar:?]
	at afc.l(SourceFile:39) ~[14w31a.jar:?]
	at afz.l(SourceFile:203) ~[14w31a.jar:?]
	at xk.j(SourceFile:1298) ~[14w31a.jar:?]
	at xl.j(SourceFile:194) ~[14w31a.jar:?]
	at afc.j(SourceFile:44) ~[14w31a.jar:?]
	at afz.j(SourceFile:259) ~[14w31a.jar:?]
	at afe.j(SourceFile:57) ~[14w31a.jar:?]
	at aqh.a(SourceFile:1410) ~[14w31a.jar:?]
	at qo.a(SourceFile:601) ~[14w31a.jar:?]
	at aqh.g(SourceFile:1388) ~[14w31a.jar:?]
	at aqh.i(SourceFile:1281) ~[14w31a.jar:?]
	at qo.i(SourceFile:479) ~[14w31a.jar:?]
	at net.minecraft.server.MinecraftServer.y(SourceFile:606) ~[14w31a.jar:?]
	... 4 more
[14:35:12] [Server thread/ERROR]: This crash report has been saved to: /Users/wmontoza/Library/Application Support/minecraft/crash-reports/crash-2014-07-31_14.35.12-server.txt
[14:35:12] [Server thread/INFO]: Stopping server
[14:35:12] [Server thread/INFO]: Saving players
[14:35:12] [Server thread/INFO]: Saving worlds
[14:35:12] [Server thread/INFO]: Saving chunks for level 'BamboWorld'/Overworld
---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 31/07/14 14:35
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
	at bou.a(SourceFile:77)
	at bou.a(SourceFile:65)
	at boy.a(SourceFile:77)
	at boy.a(SourceFile:37)
	at boy.a(SourceFile:22)
	at aay.a(SourceFile:97)
	at zj.a(SourceFile:49)
	at zb.a(SourceFile:72)
	at xl.bE(SourceFile:446)
	at xk.l(SourceFile:1430)
	at xl.l(SourceFile:316)
	at afc.l(SourceFile:39)
	at afz.l(SourceFile:203)
	at xk.j(SourceFile:1298)
	at xl.j(SourceFile:194)
	at afc.j(SourceFile:44)
	at afz.j(SourceFile:259)
	at afe.j(SourceFile:57)
	at aqh.a(SourceFile:1410)
	at qo.a(SourceFile:601)
	at aqh.g(SourceFile:1388)
	at aqh.i(SourceFile:1281)
	at qo.i(SourceFile:479)
	at net.minecraft.server.MinecraftServer.y(SourceFile:606)
	at net.minecraft.server.MinecraftServer.x(SourceFile:530)
	at cxc.x(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:446)
	at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at bou.a(SourceFile:77)
	at bou.a(SourceFile:65)
	at boy.a(SourceFile:77)
	at boy.a(SourceFile:37)
	at boy.a(SourceFile:22)
	at aay.a(SourceFile:97)
	at zj.a(SourceFile:49)
	at zb.a(SourceFile:72)
	at xl.bE(SourceFile:446)
	at xk.l(SourceFile:1430)
	at xl.l(SourceFile:316)
	at afc.l(SourceFile:39)
	at afz.l(SourceFile:203)
	at xk.j(SourceFile:1298)
	at xl.j(SourceFile:194)
	at afc.j(SourceFile:44)
	at afz.j(SourceFile:259)
	at afe.j(SourceFile:57)
	at aqh.a(SourceFile:1410)
	at qo.a(SourceFile:601)
	at aqh.g(SourceFile:1388)

-- Entity being ticked --
Details:
	Entity Type: PigZombie (afe)
	Entity ID: 121
	Entity Name: Homem-porco Zumbi
	Entity's Exact location: -1103,27, 63,00, 1283,86
	Entity's Block location: -1104,00,63,00,1283,00 - World: (-1104,63,1283), Chunk: (at 0,3,3 in -69,80; contains blocks -1104,0,1280 to -1089,255,1295), Region: (-3,2; contains chunks -96,64 to -65,95, blocks -1536,0,1024 to -1025,255,1535)
	Entity's Momentum: -0,01, -0,08, -0,02
	Entity's Rider: ~~ERROR~~ NullPointerException: null
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aqh.i(SourceFile:1281)
	at qo.i(SourceFile:479)

-- Affected level --
Details:
	Level name: BamboWorld
	All players: 1 total; [qr['wmontoza'/120, l='BamboWorld', x=-1103,15, y=63,00, z=1280,98]]
	Chunk stats: ServerChunkCache: 1822 Drop: 0
	Level seed: -1016816502
	Level generator: ID 02 - largeBiomes, ver 0. Features enabled: true
	Level generator options: 
	Level spawn location: -12,00,64,00,244,00 - World: (-12,64,244), Chunk: (at 4,4,4 in -1,15; contains blocks -16,0,240 to -1,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 2083127 game time, 3097413 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 59349 (now: false), thunder time: 91291 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.y(SourceFile:606)
	at net.minecraft.server.MinecraftServer.x(SourceFile:530)
	at cxc.x(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:446)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 14w31a
	Operating System: Mac OS X (x86_64) version 10.9.4
	Java Version: 1.8.0_11, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 284540512 bytes (271 MB) / 677244928 bytes (645 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 98
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [qr['wmontoza'/120, l='BamboWorld', x=-1103,15, y=63,00, z=1280,98]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
#@!@# Game crashed! Crash report saved to: #@!@# /~/Library/Application Support/minecraft/crash-reports/crash-2014-07-31_14.35.12-server.txt