Everytime i log on it crashes
---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 4/11/14 5:53 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at bab.k(SourceFile:129)
at bln.a(SourceFile:1114)
at ic.a(SourceFile:43)
at ic.a(SourceFile:9)
at ej.a(SourceFile:167)
at blq.e(SourceFile:212)
at ban.p(SourceFile:1306)
at ban.ak(SourceFile:774)
at ban.f(SourceFile:728)
at net.minecraft.client.main.Main.main(SourceFile:148)

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

-- Head --
Stacktrace:
at bab.k(SourceFile:129)
at bln.a(SourceFile:1114)
at ic.a(SourceFile:43)
at ic.a(SourceFile:9)
at ej.a(SourceFile:167)
at blq.e(SourceFile:212)

-- Affected level --
Details:
Level name: MpServer
All players: 8 total; [blw['blackphantom2216'/19818, l='MpServer', x=-68.00, y=6.62, z=816.42], bnx['Aidanboomba'/17336, l='MpServer', x=-68.00, y=5.01, z=816.00], bnx['Hunter61696'/19242, l='MpServer', x=-68.00, y=5.00, z=816.00], bnx['Lazygirl09'/10641, l='MpServer', x=-68.00, y=5.00, z=816.00], bnx['cheeserock9'/16147, l='MpServer', x=-68.00, y=5.00, z=816.00], bnx['btitan13'/19169, l='MpServer', x=-68.00, y=5.00, z=816.00], bnx['Guy24752'/19828, l='MpServer', x=-70.31, y=4.00, z=841.84], bnx['Artomix123'/19855, l='MpServer', x=-68.00, y=10.00, z=816.00]]
Chunk stats: MultiplayerChunkCache: 310, 310
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-68,10,816), Chunk: (at 12,0,0 in -5,51; contains blocks -80,0,816 to -65,255,831), Region: (-1,1; contains chunks -32,32 to -1,63, blocks -512,0,512 to -1,255,1023)
Level time: 219421878 game time, 219538372 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: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 52 total; [bnx['Aidanboomba'/17336, l='MpServer', x=-68.00, y=5.01, z=816.00], bnx['Artomix123'/19855, l='MpServer', x=-68.00, y=10.00, z=816.00], bnx['Hunter61696'/19242, l='MpServer', x=-68.00, y=5.00, z=816.00], bnx['cheeserock9'/16147, l='MpServer', x=-68.00, y=5.00, z=816.00], bnx['Guy24752'/19828, l='MpServer', x=-70.31, y=4.00, z=841.84], bnx['Lazygirl09'/10641, l='MpServer', x=-68.00, y=5.00, z=816.00], bnx['btitan13'/19169, l='MpServer', x=-68.00, y=5.00, z=816.00], bnx['cheeserock9'/16147, l='MpServer', x=-68.00, y=5.00, z=816.00], bnx['Guy24752'/19828, l='MpServer', x=-70.31, y=4.00, z=841.84], bnx['Artomix123'/19855, l='MpServer', x=-68.00, y=10.00, z=816.00], bnx['Hunter61696'/19242, l='MpServer', x=-68.00, y=5.00, z=816.00], wd['Bat'/77, l='MpServer', x=-77.81, y=12.10, z=808.41], zb['arrow'/78, l='MpServer', x=-66.44, y=4.53, z=816.53], zb['arrow'/79, l='MpServer', x=-67.63, y=3.97, z=818.00], zb['arrow'/85, l='MpServer', x=-67.03, y=4.69, z=817.53], zb['arrow'/84, l='MpServer', x=-67.06, y=4.63, z=817.53], zb['arrow'/87, l='MpServer', x=-67.06, y=4.84, z=817.53], zb['arrow'/86, l='MpServer', x=-67.06, y=4.78, z=817.53], zb['arrow'/81, l='MpServer', x=-67.22, y=4.53, z=817.75], zb['arrow'/80, l='MpServer', x=-67.50, y=3.97, z=818.44], zb['arrow'/83, l='MpServer', x=-67.06, y=4.56, z=817.53], zb['arrow'/82, l='MpServer', x=-67.16, y=4.53, z=817.56], zb['arrow'/93, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/92, l='MpServer', x=-67.75, y=3.03, z=847.50], bnx['Lazygirl09'/10641, l='MpServer', x=-68.00, y=5.00, z=816.00], zb['arrow'/95, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/94, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/89, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/88, l='MpServer', x=-67.75, y=3.97, z=832.00], bnx['btitan13'/19169, l='MpServer', x=-68.00, y=5.00, z=816.00], zb['arrow'/91, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/90, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/102, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/103, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/100, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/101, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/98, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/99, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/96, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/97, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/110, l='MpServer', x=-67.75, y=3.03, z=847.50], wd['Bat'/111, l='MpServer', x=-75.25, y=10.10, z=839.75], zb['arrow'/108, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/109, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/106, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/107, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/104, l='MpServer', x=-67.75, y=3.03, z=847.50], zb['arrow'/105, l='MpServer', x=-67.75, y=3.03, z=847.50], blw['blackphantom2216'/19818, l='MpServer', x=-68.00, y=6.62, z=816.42], zb['arrow'/115, l='MpServer', x=-59.00, y=10.38, z=808.53], bnx['Aidanboomba'/17336, l='MpServer', x=-68.00, y=5.01, z=816.00], zb['arrow'/112, l='MpServer', x=-64.56, y=4.00, z=855.78]]
Retry entities: 0 total; []
Server brand: CraftBukkit
Server type: Non-integrated multiplayer server
Stacktrace:
at blr.a(SourceFile:289)
at ban.b(SourceFile:1972)
at ban.f(SourceFile:742)
at net.minecraft.client.main.Main.main(SourceFile:148)

-- System Details --
Details:
Minecraft Version: 1.7.8
Operating System: Mac OS X (x86_64) version 10.9.2
Java Version: 1.6.0_65, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 49052304 bytes (46 MB) / 133595136 bytes (127 MB) up to 1065025536 bytes (1015 MB)
JVM Flags: 1 total; -Xmx1G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.7.8
LWJGL: 2.9.1
OpenGL: Intel HD Graphics 4000 OpenGL Engine GL version 2.1 INTEL-8.24.11, Intel Inc.
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)