My minecraft crashed when I entered the end. Now I can't get back, since it crashes all the times.

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

Minecraft has stopped running because it encountered a problem; Exception in server tick loop
This error has been saved to C:\Documents and Settings\Viktor\Application Data\.minecraft\crash-reports\crash-2012-10-31_13.06.45-server.txt for your convenience. Please include a copy of this file if you report this crash to anyone.



--- BEGIN ERROR REPORT 814f1139 --------
Generated 2012-10-31 13:06

- Minecraft Version: 1.4.2
- Operating System: Windows XP (x86) version 5.1
- Java Version: 1.7.0_09, Oracle Corporation
- Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
- Memory: 411474392 bytes (392 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- AABB Pool Size: 1219 (68264 bytes; 0 MB) allocated, 1219 (68264 bytes; 0 MB) used
- Is Modded: Probably not
- Profiler Position: N/A (disabled)
- Vec3 Pool Size: 42 (2352 bytes; 0 MB) allocated, 42 (2352 bytes; 0 MB) used
- Player Count: 1 / 8; [ih['Player'/64, l='Viktors Värld', x=100,00, y=49,00, z=0,00]]
- World Viktors Värld Entities: 113 total; [pm['Enderman'/65, l='Viktors Värld', x=109,50, y=45,00, z=6,50], pm['Enderman'/66, l='Viktors Värld', x=107,46, y=46,00, z=4,10], pm['Enderman'/67, l='Viktors Värld', x=111,92, y=44,00, z=6,61], lj['Erfarenhetsklot'/69, l='Viktors Värld', x=99,80, y=50,08, z=0,01], ih['Player'/64, l='Viktors Värld', x=100,00, y=49,00, z=0,00], pm['Enderman'/70, l='Viktors Värld', x=-56,50, y=57,00, z=-65,50], pm['Enderman'/71, l='Viktors Värld', x=-50,54, y=57,00, z=-70,50], pm['Enderman'/72, l='Viktors Värld', x=-50,50, y=57,00, z=-63,35], pm['Enderman'/73, l='Viktors Värld', x=-53,32, y=57,00, z=-63,11], pm['Enderman'/74, l='Viktors Värld', x=-55,92, y=58,00, z=-24,57], pm['Enderman'/75, l='Viktors Värld', x=-54,50, y=58,00, z=-24,50], pm['Enderman'/76, l='Viktors Värld', x=-61,75, y=58,00, z=-14,19], pm['Enderman'/77, l='Viktors Värld', x=-48,50, y=61,00, z=31,50], pm['Enderman'/78, l='Viktors Värld', x=-48,45, y=61,00, z=32,63], pm['Enderman'/79, l='Viktors Värld', x=-53,55, y=60,00, z=34,03], pm['Enderman'/80, l='Viktors Värld', x=-33,68, y=57,00, z=-58,91], pm['Enderman'/82, l='Viktors Värld', x=-36,04, y=60,00, z=-12,59], pm['Enderman'/83, l='Viktors Värld', x=-47,50, y=61,00, z=28,50], pm['Enderman'/84, l='Viktors Värld', x=-39,48, y=26,00, z=43,74], pm['Enderman'/85, l='Viktors Värld', x=-43,70, y=27,00, z=36,96], pm['Enderman'/86, l='Viktors Värld', x=-39,80, y=59,00, z=40,38], pm['Enderman'/87, l='Viktors Värld', x=-39,50, y=57,00, z=56,50], pm['Enderman'/88, l='Viktors Värld', x=-47,59, y=57,00, z=55,00], pm['Enderman'/89, l='Viktors Värld', x=-36,19, y=58,00, z=51,63], pm['Enderman'/90, l='Viktors Värld', x=-19,44, y=62,00, z=-2,10], pm['Enderman'/91, l='Viktors Värld', x=-24,35, y=62,00, z=8,06], qi['Pil'/92, l='Viktors Värld', x=-24,00, y=58,77, z=78,82], qi['Pil'/93, l='Viktors Värld', x=-31,98, y=57,05, z=84,07], pm['Enderman'/94, l='Viktors Värld', x=-6,26, y=55,00, z=-62,90], pm['Enderman'/95, l='Viktors Värld', x=-1,02, y=61,00, z=-39,09], pm['Enderman'/96, l='Viktors Värld', x=-8,54, y=59,00, z=-40,78], pm['Enderman'/97, l='Viktors Värld', x=-4,86, y=60,00, z=-39,53], pm['Enderman'/98, l='Viktors Värld', x=-4,35, y=61,00, z=-32,41], pm['Enderman'/99, l='Viktors Värld', x=-10,47, y=62,00, z=-16,59], pm['Enderman'/100, l='Viktors Värld', x=-1,85, y=62,00, z=-18,61], pm['Enderman'/101, l='Viktors Värld', x=-5,82, y=62,00, z=-21,90], pm['Enderman'/102, l='Viktors Värld', x=-13,05, y=62,00, z=-13,01], pm['Enderman'/103, l='Viktors Värld', x=-0,53, y=62,00, z=-7,95], pm['Enderman'/104, l='Viktors Värld', x=-12,50, y=60,00, z=39,51], pm['Enderman'/105, l='Viktors Värld', x=-5,50, y=60,00, z=45,50], pm['Enderman'/106, l='Viktors Värld', x=-6,50, y=60,00, z=46,50], pm['Enderman'/107, l='Viktors Värld', x=-3,50, y=60,00, z=44,50], pm['Enderman'/108, l='Viktors Värld', x=-8,53, y=34,00, z=54,25], pm['Enderman'/109, l='Viktors Värld', x=-15,50, y=33,00, z=51,50], qi['Pil'/110, l='Viktors Värld', x=-2,21, y=-14,42, z=131,03], pm['Enderman'/111, l='Viktors Värld', x=13,50, y=59,00, z=-68,50], pm['Enderman'/112, l='Viktors Värld', x=14,50, y=59,00, z=-71,50], pm['Enderman'/113, l='Viktors Värld', x=0,16, y=62,00, z=-20,50], pm['Enderman'/114, l='Viktors Värld', x=13,48, y=62,00, z=-16,21], pm['Enderman'/115, l='Viktors Värld', x=3,76, y=62,00, z=-16,80], pm['Enderman'/116, l='Viktors Värld', x=15,95, y=61,00, z=-23,65], pm['Enderman'/117, l='Viktors Värld', x=9,42, y=62,00, z=-2,05], pm['Enderman'/118, l='Viktors Värld', x=13,52, y=62,00, z=-11,45], pm['Enderman'/119, l='Viktors Värld', x=1,97, y=62,00, z=-10,44], pm['Enderman'/120, l='Viktors Värld', x=8,77, y=62,00, z=19,73], pm['Enderman'/121, l='Viktors Värld', x=25,36, y=60,00, z=-52,45], pm['Enderman'/122, l='Viktors Värld', x=19,36, y=60,00, z=-42,30], pm['Enderman'/123, l='Viktors Värld', x=16,56, y=61,00, z=-42,02], lj['Erfarenhetsklot'/124, l='Viktors Värld', x=99,80, y=50,08, z=0,01], lj['Erfarenhetsklot'/125, l='Viktors Värld', x=100,00, y=50,13, z=0,00], lj['Erfarenhetsklot'/126, l='Viktors Värld', x=16,26, y=64,42, z=-44,28], pm['Enderman'/127, l='Viktors Värld', x=19,51, y=61,00, z=-30,84], pm['Enderman'/128, l='Viktors Värld', x=16,05, y=62,00, z=-19,57], pm['Enderman'/129, l='Viktors Värld', x=25,50, y=61,00, z=-4,46], pm['Enderman'/130, l='Viktors Värld', x=26,09, y=61,00, z=-10,82], pm['Enderman'/131, l='Viktors Värld', x=19,82, y=62,00, z=11,30], pm['Enderman'/132, l='Viktors Värld', x=23,22, y=61,00, z=21,58], qi['Pil'/133, l='Viktors Värld', x=17,02, y=7,87, z=144,21], qi['Pil'/134, l='Viktors Värld', x=21,47, y=-45,29, z=160,27], pm['Enderman'/135, l='Viktors Värld', x=37,44, y=57,00, z=-112,30], pm['Enderman'/136, l='Viktors Värld', x=41,01, y=59,00, z=-20,61], qi['Pil'/137, l='Viktors Värld', x=37,99, y=45,98, z=103,17], pm['Enderman'/138, l='Viktors Värld', x=42,50, y=48,00, z=100,50], pm['Enderman'/139, l='Viktors Värld', x=52,60, y=55,00, z=-63,30], pm['Enderman'/140, l='Viktors Värld', x=60,59, y=60,00, z=28,50], pm['Enderman'/141, l='Viktors Värld', x=49,49, y=60,00, z=31,74], pm['Enderman'/142, l='Viktors Värld', x=52,92, y=60,00, z=31,39], pm['Enderman'/143, l='Viktors Värld', x=48,33, y=59,00, z=40,92], pm['Enderman'/144, l='Viktors Värld', x=53,67, y=60,00, z=32,35], pm['Enderman'/145, l='Viktors Värld', x=52,63, y=60,00, z=35,95], pm['Enderman'/146, l='Viktors Värld', x=75,50, y=39,00, z=-37,50], pm['Enderman'/147, l='Viktors Värld', x=72,50, y=59,00, z=15,50], pm['Enderman'/148, l='Viktors Värld', x=72,67, y=59,00, z=21,54], pm['Enderman'/149, l='Viktors Värld', x=69,32, y=58,00, z=37,46], pm['Enderman'/150, l='Viktors Värld', x=80,32, y=57,00, z=-6,13], pm['Enderman'/151, l='Viktors Värld', x=85,04, y=55,00, z=-8,59], pm['Enderman'/152, l='Viktors Värld', x=83,06, y=55,00, z=-8,65], pm['Enderman'/153, l='Viktors Värld', x=89,25, y=57,00, z=-6,52], qi['Pil'/154, l='Viktors Värld', x=84,91, y=43,40, z=144,62], pm['Enderman'/155, l='Viktors Värld', x=97,55, y=42,00, z=-17,28], qi['Pil'/156, l='Viktors Värld', x=109,11, y=-19,52, z=134,60], pm['Enderman'/157, l='Viktors Värld', x=112,59, y=44,00, z=3,12], qi['Pil'/158, l='Viktors Värld', x=160,24, y=-52,87, z=-76,20], qi['Pil'/159, l='Viktors Värld', x=160,56, y=19,93, z=-40,48], qi['Pil'/160, l='Viktors Värld', x=160,48, y=-5,47, z=-20,30], qi['Pil'/161, l='Viktors Värld', x=160,56, y=14,62, z=3,43], qi['Pil'/162, l='Viktors Värld', x=176,84, y=-29,57, z=-87,89], qi['Pil'/163, l='Viktors Värld', x=176,15, y=-30,13, z=-73,88], qi['Pil'/164, l='Viktors Värld', x=176,40, y=-35,52, z=-74,25], qi['Pil'/165, l='Viktors Värld', x=176,38, y=-11,70, z=-57,99], qi['Pil'/166, l='Viktors Värld', x=176,53, y=-4,31, z=-9,40], qi['Pil'/167, l='Viktors Värld', x=176,86, y=19,88, z=-0,88], qi['Pil'/168, l='Viktors Värld', x=177,00, y=7,34, z=13,89], qi['Pil'/169, l='Viktors Värld', x=176,24, y=-62,77, z=4,43], pm['Enderman'/170, l='Viktors Värld', x=3,50, y=61,00, z=49,50], pm['Enderman'/171, l='Viktors Värld', x=1,50, y=61,00, z=43,50], pm['Enderman'/173, l='Viktors Värld', x=9,50, y=58,00, z=71,50], pm['Enderman'/174, l='Viktors Värld', x=14,50, y=58,00, z=71,50], pm['Enderman'/175, l='Viktors Värld', x=15,50, y=58,00, z=73,50], pm['Enderman'/176, l='Viktors Värld', x=2,50, y=58,00, z=68,50], pm['Enderman'/177, l='Viktors Värld', x=16,50, y=38,00, z=73,50], pm['Enderman'/178, l='Viktors Värld', x=38,50, y=42,00, z=65,50], lj['Erfarenhetsklot'/125, l='Viktors Värld', x=100,00, y=50,13, z=0,00]]
- World Viktors Värld Players: 1 total; [ih['Player'/64, l='Viktors Värld', x=100,00, y=49,00, z=0,00]]
- World Viktors Värld Chunk Stats: ServerChunkCache: 441 Drop: 0
- Type: Integrated Server

java.lang.IllegalStateException: Entity is already tracked!
	at hz.a(SourceFile:67)
	at hz.a(SourceFile:56)
	at ia.a(SourceFile:24)
	at xe.a(SourceFile:786)
	at ie.a(SourceFile:553)
	at xe.d(SourceFile:778)
	at ge.a(SourceFile:355)
	at lb.b(SourceFile:1442)
	at alc.a(SourceFile:62)
	at lb.D(SourceFile:659)
	at lb.d(SourceFile:622)
	at lj.j_(SourceFile:111)
	at xe.a(SourceFile:1218)
	at ie.a(SourceFile:424)
	at xe.g(SourceFile:1197)
	at xe.h(SourceFile:1122)
	at ie.h(SourceFile:352)
	at net.minecraft.server.MinecraftServer.r(SourceFile:718)
	at net.minecraft.server.MinecraftServer.q(SourceFile:661)
	at bcb.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:595)
	at fp.run(SourceFile:818)
--- END ERROR REPORT 5d94a4a1 ----------