Health Bar crash

      Minecraft has crashed!
      ----------------------

Minecraft has stopped running because it encountered a problem; Exception in world tick

A full error report has been saved to /Users/javierlizarazo/Library/Application Support/minecraft/crash-reports/crash-2013-03-31_02.19.23-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash :(



--- BEGIN ERROR REPORT 181b67be --------
Full report at:
/Users/javierlizarazo/Library/Application Support/minecraft/crash-reports/crash-2013-03-31_02.19.23-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 3/31/13 2:19 AM

-- Head --
Stacktrace:
	at arj.a(SourceFile:190)
	at bdl.a(SourceFile:1139)
	at fd.a(SourceFile:99)
	at ci.b(SourceFile:350)
	at bdl.d(SourceFile:95)

-- Affected level --
Details:
	Level name: MpServer
	All players: 2 total; [bdw['Xavi96'/1206, l='MpServer', x=397.97, y=70.62, z=-2551.08], bfl['nicosoler'/1093, l='MpServer', x=396.91, y=68.56, z=-2548.88]]
	Chunk stats: MultiplayerChunkCache: 49
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options:
	Level spawn location: World: (478,66,-1505), Chunk: (at 14,4,15 in 29,-95; contains blocks 464,0,-1520 to 479,255,-1505), Region: (0,-3; contains chunks 0,-96 to 31,-65, blocks 0,0,-1536 to 511,255,-1025)
	Level time: 77376696 game time, 88164571 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 4 total; [bdw['Xavi96'/1206, l='MpServer', x=397.97, y=70.62, z=-2551.08], bfl['nicosoler'/1093, l='MpServer', x=432.44, y=69.00, z=-2575.91], bfl['nicosoler'/1093, l='MpServer', x=396.91, y=68.56, z=-2548.88], bfl['nicosoler'/1093, l='MpServer', x=396.91, y=68.56, z=-2548.88]]
	Retry entities: 0 total; []
Stacktrace:
	at bdt.a(SourceFile:282)
	at net.minecraft.client.Minecraft.l(SourceFile:1332)
	at net.minecraft.client.Minecraft.K(SourceFile:574)
	at net.minecraft.client.Minecraft.run(SourceFile:526)
	at java.lang.Thread.run(Thread.java:680)

-- Affected level --
Details:
	Level name: MpServer
	All players: 2 total; [bdw['Xavi96'/1206, l='MpServer', x=397.97, y=70.62, z=-2551.08], bfl['nicosoler'/1093, l='MpServer', x=396.91, y=68.56, z=-2548.88]]
	Chunk stats: MultiplayerChunkCache: 49
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options:
	Level spawn location: World: (478,66,-1505), Chunk: (at 14,4,15 in 29,-95; contains blocks 464,0,-1520 to 479,255,-1505), Region: (0,-3; contains chunks 0,-96 to 31,-65, blocks 0,0,-1536 to 511,255,-1025)
	Level time: 77376696 game time, 88164571 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 4 total; [bdw['Xavi96'/1206, l='MpServer', x=397.97, y=70.62, z=-2551.08], bfl['nicosoler'/1093, l='MpServer', x=432.44, y=69.00, z=-2575.91], bfl['nicosoler'/1093, l='MpServer', x=396.91, y=68.56, z=-2548.88], bfl['nicosoler'/1093, l='MpServer', x=396.91, y=68.56, z=-2548.88]]
	Retry entities: 0 total; []

-- System Details --
Details:
	Minecraft Version: 1.5.1
	Operating System: Mac OS X (i386) version 10.8.2
	Java Version: 1.6.0_35, Apple Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Apple Inc.
	Memory: 973695760 bytes (928 MB) / 1067057152 bytes (1017 MB) up to 1067057152 bytes (1017 MB)
	JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms1024M -Xmx1024M
	AABB Pool Size: 28 (1568 bytes; 0 MB) allocated, 24 (1344 bytes; 0 MB) used
	Suspicious classes: IWrUpdater, Config, WrUpdaterThreaded, ...]
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	LWJGL: 2.4.2
	OpenGL: Intel HD Graphics 3000 OpenGL Engine GL version 2.1 APPLE-8.0.61, Intel Inc.
	Is Modded: Very likely; Jar signature invalidated
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 287 (16072 bytes; 0 MB) allocated, 14 (784 bytes; 0 MB) used

java.lang.NullPointerException
	at arj.a(SourceFile:190)
	at bdl.a(SourceFile:1139)
	at fd.a(SourceFile:99)
	at ci.b(SourceFile:350)
	at bdl.d(SourceFile:95)
	at bdt.b(SourceFile:58)
	at net.minecraft.client.Minecraft.l(SourceFile:1325)
	at net.minecraft.client.Minecraft.K(SourceFile:574)
	at net.minecraft.client.Minecraft.run(SourceFile:526)
	at java.lang.Thread.run(Thread.java:680)
--- END ERROR REPORT 2104f6f ----------