---- Minecraft Crash Report ----
// Why is it breaking :(

Time: 10/04/13 3:31 PM
Description: Ticking entity

java.lang.NullPointerException
	at net.minecraft.server.MinecraftServer.a(SourceFile:591)
	at mp.c(SourceFile:1514)
	at rh.c(SourceFile:212)
	at mp.x(SourceFile:314)
	at mp.l_(SourceFile:277)
	at rh.l_(SourceFile:64)
	at aab.a(SourceFile:1336)
	at iz.a(SourceFile:508)
	at aab.g(SourceFile:1314)
	at aab.h(SourceFile:1221)
	at iz.h(SourceFile:390)
	at net.minecraft.server.MinecraftServer.r(SourceFile:462)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bjh.q(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gp.run(SourceFile:573)


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

-- Head --
Stacktrace:
	at net.minecraft.server.MinecraftServer.a(SourceFile:591)
	at mp.c(SourceFile:1514)
	at rh.c(SourceFile:212)
	at mp.x(SourceFile:314)
	at mp.l_(SourceFile:277)
	at rh.l_(SourceFile:64)
	at aab.a(SourceFile:1336)
	at iz.a(SourceFile:508)
	at aab.g(SourceFile:1314)

-- Entity being ticked --
Details:
	Entity Type: Item (rh)
	Entity ID: 5274
	Entity Name: item.tile.lever
	Entity's Exact location: 20.91, 68.48, 21.51
	Entity's Block location: World: (20,68,21), Chunk: (at 4,4,5 in 1,1; contains blocks 16,0,16 to 31,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: 0.14, 0.16, -0.16
Stacktrace:
	at aab.h(SourceFile:1221)
	at iz.h(SourceFile:390)

-- Affected level --
Details:
	Level name: Portal Death Test
	All players: 1 total; [jc['ItchyFlea'/625, l='Portal Death Test', x=20.77, y=67.00, z=21.71]]
	Chunk stats: ServerChunkCache: 441 Drop: 0
	Level seed: 194165197133904637
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (0,0,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 0 game time, 0 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: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:462)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bjh.q(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gp.run(SourceFile:573)

-- System Details --
Details:
	Minecraft Version: 1.5.1
	Operating System: Windows XP (x86) version 5.1
	Java Version: 1.6.0_35, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Sun Microsystems Inc.
	Memory: 301649920 bytes (287 MB) / 518979584 bytes (494 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -Xmx512M -Xms512M
	AABB Pool Size: 8670 (485520 bytes; 0 MB) allocated, 4888 (273728 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 3, allocated: 4, tallocated: 60
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1744 (97664 bytes; 0 MB) allocated, 891 (49896 bytes; 0 MB) used
	Player Count: 1 / 8; [jc['ItchyFlea'/625, l='Portal Death Test', x=20.77, y=67.00, z=21.71]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.