Crash using /effect 0 200 127

When I did a Speed Effect to get threw my humungas mine i crash and now the survival world is broken 😞 its my Best one

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

Minecraft has stopped running because it encountered a problem; Ticking mob effect instance

A full error report has been saved to C:\Users\Jack Ellery\AppData\Roaming\.minecraft\crash-reports\crash-2013-05-06_16.29.42-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 18789e5c --------
Full report at:
C:\Users\Jack Ellery\AppData\Roaming\.minecraft\crash-reports\crash-2013-05-06_16.29.42-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 6/05/13 4:29 PM

-- Head --
Stacktrace:
	at ml.a(SourceFile:89)

-- Mob effect being ticked --
Details:
	Effect Name: ~~ERROR~~ NullPointerException: null
	Effect ID: 0
	Effect Duration: 4000
	Effect Amplifier: 127
	Effect is Splash: false
	Effect is Ambient: false
Stacktrace:
	at ng.bA(SourceFile:1572)
	at ng.x(SourceFile:413)
	at mp.l_(SourceFile:277)
	at ng.l_(SourceFile:528)
	at sq.l_(SourceFile:203)
	at bdw.l_(EntityClientPlayerMP.java:166)
	at aab.a(SourceFile:1336)
	at aab.g(SourceFile:1314)

-- Entity being ticked --
Details:
	Entity Type: null (bdw)
	Entity ID: 146
	Entity Name: sprattiehunt
	Entity's Exact location: -1004.70, 32.62, -816.79
	Entity's Block location: World: (-1005,32,-817), Chunk: (at 3,2,15 in -63,-52; contains blocks -1008,0,-832 to -993,255,-817), Region: (-2,-2; contains chunks -64,-64 to -33,-33, blocks -1024,0,-1024 to -513,255,-513)
	Entity's Momentum: 0.00, 0.00, 0.00
Stacktrace:
	at aab.h(SourceFile:1221)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdw['sprattiehunt'/146, l='MpServer', x=-1004.70, y=32.62, z=-816.79]]
	Chunk stats: MultiplayerChunkCache: 0
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (220,64,251), Chunk: (at 12,4,11 in 13,15; contains blocks 208,0,240 to 223,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 3410149 game time, 1975807 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: 1 total; [bdw['sprattiehunt'/146, l='MpServer', x=-1004.70, y=32.62, z=-816.79]]
	Retry entities: 0 total; []
Stacktrace:
	at bdt.a(SourceFile:282)
	at net.minecraft.client.Minecraft.b(SourceFile:1881)
	at net.minecraft.client.Minecraft.run(SourceFile:535)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 1.5.1
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 348297512 bytes (332 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 7955 (445480 bytes; 0 MB) allocated, 7 (392 bytes; 0 MB) used
	Suspicious classes: $Proxy1[com.sijobe.installer.ActionHandler, FooterLink, GuiMain$1, ...], [com.sijobe.spc.command.StandardCommand, Achievement, Ascend, ...], [com.sijobe.spc.core.HookManager, IHook, IPlayerSP, ...], [com.sijobe.spc.hooks.CheckUpdates, InitialiseCommands, TestPlayerMP], [com.sijobe.spc.overwrite.ONetServerHandler], [com.sijobe.spc.updater.UpdateCallback, CheckVersion, ModVersion], [com.sijobe.spc.util.DynamicClassLoader, KeyListener, CommandBlockHelper, ...], [com.sijobe.spc.validation.Parameter, ParameterBoolean, ParameterDouble, ...], [com.sijobe.spc.worldedit.LocalPlayer, LocalWorld, MinecraftBiomeType, ...], [com.sijobe.spc.wrapper.Player, Minecraft, CommandBase, ...], [com.sijobe.swing.JHyperLink], [com.sk89q.worldedit.LocalPlayer, LocalWorld, BiomeType, ...], [com.sk89q.worldedit.foundation.World], [com.sk89q.worldedit.util.PropertiesConfiguration]
	IntCache: cache: 2, tcache: 0, allocated: 1, tallocated: 63
	LWJGL: 2.4.2
	OpenGL: Intel(R) HD Graphics Family GL version 3.1.0 - Build 8.15.10.2622, Intel
	Is Modded: Very likely; Jar signature invalidated
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 127 (7112 bytes; 0 MB) allocated, 23 (1288 bytes; 0 MB) used

java.lang.NullPointerException
	at ml.a(SourceFile:89)
	at ng.bA(SourceFile:1572)
	at ng.x(SourceFile:413)
	at mp.l_(SourceFile:277)
	at ng.l_(SourceFile:528)
	at sq.l_(SourceFile:203)
	at bdw.l_(EntityClientPlayerMP.java:166)
	at aab.a(SourceFile:1336)
	at aab.g(SourceFile:1314)
	at aab.h(SourceFile:1221)
	at net.minecraft.client.Minecraft.l(SourceFile:1319)
	at net.minecraft.client.Minecraft.K(SourceFile:574)
	at net.minecraft.client.Minecraft.run(SourceFile:526)
	at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 22154688 ----------