i was making bigger maps

---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 4/10/14 2:02 AM
Description: Updating screen events

java.lang.NullPointerException: Updating screen events
at ace.d(SourceFile:221)
at aca.a(SourceFile:336)
at zu.b(SourceFile:41)
at zu.a(SourceFile:58)
at yp.a(SourceFile:238)
at bkf.a(SourceFile:308)
at bdq.a(SourceFile:490)
at bdq.a(SourceFile:318)
at bco.d(SourceFile:232)
at bco.k(SourceFile:211)
at azl.p(SourceFile:1303)
at azl.ah(SourceFile:757)
at azl.f(SourceFile:711)
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 ace.d(SourceFile:221)
at aca.a(SourceFile:336)
at zu.b(SourceFile:41)
at zu.a(SourceFile:58)
at yp.a(SourceFile:238)
at bkf.a(SourceFile:308)
at bdq.a(SourceFile:490)
at bdq.a(SourceFile:318)
at bco.d(SourceFile:232)
at bco.k(SourceFile:211)

– Affected screen –
Details:
Screen name: bec

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bkl['tenttle'/4855417, l='MpServer', x=-3099.19, y=65.62, z=-34.72]]
Chunk stats: MultiplayerChunkCache: 169, 169
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-3093,64,-31), Chunk: (at 11,4,1 in -194,-2; contains blocks -3104,0,-32 to -3089,255,-17), Region: (-7,-1; contains chunks -224,-32 to -193,-1, blocks -3584,0,-512 to -3073,255,-1)
Level time: 73095518 game time, 59064833 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: 54 total; [ry['Painting'/4280345, l='MpServer', x=-2773.94, y=70.00, z=-147.50], xi['Skeleton'/5045302, l='MpServer', x=-3124.47, y=25.06, z=-34.50], vf['Horse'/5010392, l='MpServer', x=-3089.25, y=21.00, z=-27.53], xz['arrow'/5010393, l='MpServer', x=-3103.25, y=68.94, z=-17.69], xs['Villager'/5010388, l='MpServer', x=-3095.70, y=80.00, z=-35.30], xi['Skeleton'/5024795, l='MpServer', x=-3095.06, y=64.00, z=-78.53], xs['Villager'/5010389, l='MpServer', x=-3094.67, y=80.00, z=-35.28], vm['Sheep'/5011698, l='MpServer', x=-3107.16, y=67.00, z=-82.34], xs['Villager'/5010390, l='MpServer', x=-3094.02, y=80.00, z=-35.30], xs['Villager'/5010391, l='MpServer', x=-3092.22, y=80.00, z=-36.01], xn['Zombie'/5026780, l='MpServer', x=-3052.50, y=64.00, z=-35.50], xs['Villager'/5010384, l='MpServer', x=-3093.13, y=80.00, z=-35.30], xs['Villager'/5010385, l='MpServer', x=-3095.70, y=80.00, z=-36.70], xi['Skeleton'/5034908, l='MpServer', x=-3100.50, y=19.00, z=-18.50], ww['Creeper'/5028090, l='MpServer', x=-3112.98, y=77.00, z=-17.74], vs['Swifty'/4739783, l='MpServer', x=-3100.06, y=64.00, z=-35.50], xs['Villager'/5010386, l='MpServer', x=-3093.83, y=80.00, z=-36.70], xs['Villager'/5010387, l='MpServer', x=-3094.69, y=80.00, z=-36.13], xs['Villager'/5010381, l='MpServer', x=-3092.36, y=80.00, z=-36.70], bmk['TobyShax'/4670402, l='MpServer', x=-2792.06, y=71.00, z=-155.69], xs['Villager'/5010380, l='MpServer', x=-3093.09, y=80.00, z=-36.22], xs['Villager'/5010383, l='MpServer', x=-3091.30, y=80.00, z=-36.65], xs['Villager'/5010382, l='MpServer', x=-3091.30, y=80.00, z=-35.30], vd['The All Mighty'/5010377, l='MpServer', x=-3097.41, y=64.00, z=-51.41], xn['Zombie'/5044452, l='MpServer', x=-3071.50, y=31.00, z=-78.50], vm['Dinnerbone'/5010376, l='MpServer', x=-3098.09, y=64.00, z=-43.97], xs['Villager'/5010379, l='MpServer', x=-3092.11, y=80.00, z=-35.30], xs['Villager'/5010378, l='MpServer', x=-3094.78, y=80.00, z=-36.70], wp['entity.MinecartRideable.name'/5010375, l='MpServer', x=-3093.50, y=21.50, z=-36.69], xn['Zombie'/5033308, l='MpServer', x=-3075.97, y=44.00, z=-83.50], ry['Painting'/4280346, l='MpServer', x=-2771.06, y=71.00, z=-153.00], ww['Creeper'/5038790, l='MpServer', x=-3059.50, y=11.00, z=-46.50], ry['Painting'/4280346, l='MpServer', x=-2771.06, y=71.00, z=-153.00], xi['Skeleton'/5026807, l='MpServer', x=-3120.94, y=66.00, z=-15.47], ry['Painting'/4280345, l='MpServer', x=-2773.94, y=70.00, z=-147.50], vf['Mule'/5011386, l='MpServer', x=-3095.84, y=64.00, z=-15.34], vs['Diamond Eye'/5011385, l='MpServer', x=-3086.78, y=76.00, z=-16.13], xi['Skeleton'/5043059, l='MpServer', x=-3099.16, y=61.00, z=-7.50], wj['entity.MinecartChest.name'/5011388, l='MpServer', x=-3132.31, y=23.34, z=-29.50], xn['Zombie'/5020324, l='MpServer', x=-3069.94, y=58.00, z=10.66], ww['Creeper'/5024122, l='MpServer', x=-3120.41, y=73.50, z=-32.34], wh['item.item.rottenFlesh'/5039762, l='MpServer', x=-3131.28, y=65.13, z=-8.66], xi['Skeleton'/5045979, l='MpServer', x=-3083.50, y=16.00, z=-65.50], bkl['tenttle'/4855417, l='MpServer', x=-3099.19, y=65.62, z=-34.72], ww['Creeper'/5038231, l='MpServer', x=-3128.31, y=59.00, z=-17.91], vd['Chicken'/5011393, l='MpServer', x=-3101.56, y=63.00, z=-62.59], xn['Zombie'/5029847, l='MpServer', x=-3092.69, y=64.00, z=-79.72], xn['Zombie'/5030465, l='MpServer', x=-3099.50, y=16.00, z=-19.50], xi['Skeleton'/5044211, l='MpServer', x=-3059.50, y=12.00, z=-37.50], ry['Painting'/4280346, l='MpServer', x=-2771.06, y=71.00, z=-153.00], bmk['TobyShax'/4670402, l='MpServer', x=-2771.63, y=71.00, z=-205.16], ww['Creeper'/5046263, l='MpServer', x=-3127.50, y=10.00, z=-26.50], ww['Creeper'/5044770, l='MpServer', x=-3136.50, y=28.00, z=-33.50], xn['Zombie'/5039470, l='MpServer', x=-3077.06, y=42.00, z=-72.50]]
Retry entities: 0 total; []
Server brand: CraftBukkit
Server type: Non-integrated multiplayer server
Stacktrace:
at bkg.a(SourceFile:289)
at azl.b(SourceFile:1947)
at azl.f(SourceFile:720)
at net.minecraft.client.main.Main.main(SourceFile:148)

– System Details –
Details:
Minecraft Version: 1.7.5
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.6.0_24, Sun Microsystems Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
Memory: 124719336 bytes (118 MB) / 396623872 bytes (378 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 1.7.5
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 9.17.10.3347, Intel
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 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)