Crashing while expanding map with paper

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

Time: 4/03/14 10:31 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['Hacsempious'/2326838, l='MpServer', x=36.38, y=70.62, z=-300.07]]
	Chunk stats: MultiplayerChunkCache: 225, 225
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (1245,63,-307), Chunk: (at 13,3,13 in 77,-20; contains blocks 1232,0,-320 to 1247,255,-305), Region: (2,-1; contains chunks 64,-32 to 95,-1, blocks 1024,0,-512 to 1535,255,-1)
	Level time: 26309460 game time, 28250788 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: 27 total; [bkl['Hacsempious'/2326838, l='MpServer', x=36.38, y=70.62, z=-300.07], vd['Chicken'/2326857, l='MpServer', x=-2.06, y=64.00, z=-269.66], vm['Sheep'/2326856, l='MpServer', x=19.09, y=64.00, z=-250.88], vd['Chicken'/2326851, l='MpServer', x=15.47, y=64.00, z=-261.44], vd['Chicken'/2326850, l='MpServer', x=-0.34, y=64.00, z=-270.56], vm['Sheep'/2326849, l='MpServer', x=16.38, y=64.00, z=-251.63], ww['Creeper'/2326848, l='MpServer', x=59.50, y=37.00, z=-283.50], wh['item.item.map'/2326855, l='MpServer', x=50.63, y=51.13, z=-340.25], xn['Zombie'/2326854, l='MpServer', x=30.50, y=16.00, z=-338.50], vm['Sheep'/2326853, l='MpServer', x=18.53, y=64.00, z=-247.13], vm['Sheep'/2326852, l='MpServer', x=16.34, y=64.00, z=-255.78], ve['Cow'/2326874, l='MpServer', x=23.91, y=64.00, z=-375.06], ve['Cow'/2326875, l='MpServer', x=11.47, y=73.00, z=-374.13], xn['Zombie'/2326872, l='MpServer', x=87.50, y=19.00, z=-233.50], vm['Sheep'/2326878, l='MpServer', x=-29.88, y=64.00, z=-356.06], vm['Sheep'/2326879, l='MpServer', x=-33.38, y=66.00, z=-349.22], ve['Cow'/2326876, l='MpServer', x=11.47, y=74.92, z=-370.70], vm['Sheep'/2326877, l='MpServer', x=-23.41, y=63.00, z=-358.78], vm['Sheep'/2326866, l='MpServer', x=25.13, y=63.00, z=-228.91], wh['item.item.rottenFlesh'/2326867, l='MpServer', x=62.88, y=64.13, z=-363.72], vm['Sheep'/2326864, l='MpServer', x=13.13, y=63.00, z=-223.81], vm['Sheep'/2326865, l='MpServer', x=32.41, y=63.00, z=-235.78], vd['Chicken'/2326870, l='MpServer', x=-17.41, y=63.00, z=-258.53], vm['Sheep'/2326871, l='MpServer', x=-22.72, y=65.00, z=-347.06], vm['Sheep'/2326868, l='MpServer', x=-36.59, y=64.00, z=-267.44], vm['Sheep'/2326869, l='MpServer', x=-29.75, y=63.00, z=-260.09], xn['Zombie'/2326945, l='MpServer', x=31.53, y=15.00, z=-337.16]]
	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 8 (amd64) version 6.2
	Java Version: 1.7.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1540970144 bytes (1469 MB) / 2058878976 bytes (1963 MB) up to 2058878976 bytes (1963 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2048M -Xms2048M
	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: GeForce GT 750M/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
	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)