2013-07-16 16:08:47 [SEVERE] Encountered an unexpected exception ArrayIndexOutOfBoundsException
java.lang.ArrayIndexOutOfBoundsException
	at java.lang.System.arraycopy(Native Method)
	at net.minecraft.crash.CrashReportCategory.func_85073_a(CrashReportCategory.java:137)
	at net.minecraft.crash.CrashReport.func_85057_a(CrashReport.java:251)
	at net.minecraft.world.World.func_72914_a(World.java:4389)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:656)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:274)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:570)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:468)
	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)



---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 7/16/13 4:08 PM
Description: Exception in server tick loop

java.lang.ArrayIndexOutOfBoundsException
	at java.lang.System.arraycopy(Native Method)
	at net.minecraft.crash.CrashReportCategory.func_85073_a(CrashReportCategory.java:137)
	at net.minecraft.crash.CrashReport.func_85057_a(CrashReport.java:251)
	at net.minecraft.world.World.func_72914_a(World.java:4389)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:656)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:274)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:570)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:468)
	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)


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

-- System Details --
Details:
	Minecraft Version: 1.5.1
	Operating System: Linux (amd64) version 3.2.0-24-generic
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 194900352 bytes (185 MB) / 565051392 bytes (538 MB) up to 3652583424 bytes (3483 MB)
	JVM Flags: 7 total; -Xmx3500M -Xms500M -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=2 -XX:+AggressiveOpts
	AABB Pool Size: 6426 (359856 bytes; 0 MB) allocated, 80 (4480 bytes; 0 MB) used
	Suspicious classes: FML and Forge are installed
	IntCache: cache: 0, tcache: 7278, allocated: 1, tallocated: 31
	FML: MCP v7.44 FML v5.1.28.656 Minecraft Forge 7.7.1.656 7 mods loaded, 7 mods active
	mcp{7.44} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	FML{5.1.28.656} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	Forge{7.7.1.656} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	Modifyworld2{1.5.0.0} [ModifyWorld2] (ModifyWorld2_1.5.1.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	MyTown{1.5.0.0} [MyTown] (MyTown_1.5.1.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	PermissionsEx{1.5.0.0} [PermissionsEx] (PermissionsEx_1.5.1.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	TerraFirmaCraft{Build 76 Hotfix 17} [TerraFirmaCraft] (TFCraft-Universal-Core-B2-Build76Hotfix18.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1515 (84840 bytes; 0 MB) allocated, 1293 (72408 bytes; 0 MB) used
	Player Count: 2 / 30; [EntityPlayerMP['xxx'/73197, l='world', x=-6252.31, y=149.00, z=-11511.69], EntityPlayerMP['xxx'/94970, l='world', x=-5.81, y=252.00, z=-18.62]]
	Is Modded: Definitely; Server brand changed to 'fml,forge'
	Type: Dedicated Server (map_server.txt)