---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 4/4/13 8:01 PM
Description: Exception while updating neighbours

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
	at java.util.HashMap$KeyIterator.next(HashMap.java:828)
	at java.util.AbstractCollection.toArray(AbstractCollection.java:124)
	at java.util.ArrayList.<init>(ArrayList.java:131)
	at aoe.k(SourceFile:63)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)
	at aab.g(SourceFile:463)
	at aly.h_(SourceFile:243)
	at aoi.a(SourceFile:131)
	at abw.a(SourceFile:367)
	at aab.f(SourceFile:302)
	at aly.a(SourceFile:51)
	at iz.a(SourceFile:430)
	at iz.b(SourceFile:142)
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	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 java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
	at java.util.HashMap$KeyIterator.next(HashMap.java:828)
	at java.util.AbstractCollection.toArray(AbstractCollection.java:124)
	at java.util.ArrayList.<init>(ArrayList.java:131)
	at aoe.k(SourceFile:63)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,23), Chunk: (at 0,6,7 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:443)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,26), Chunk: (at 0,6,10 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:444)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #55 (tile.redstoneDust // aoe)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aab.f(SourceFile:441)
	at aoe.k(SourceFile:67)
	at aoe.a(SourceFile:206)

-- Block being updated --
Details:
	Source block type: ID #94 (tile.diode // aoi)
	Block type: ID #55 (tile.redstoneDust // aoe)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (272,109,25), Chunk: (at 0,6,9 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at aab.g(SourceFile:463)
	at aly.h_(SourceFile:243)
	at aoi.a(SourceFile:131)
	at abw.a(SourceFile:367)
	at aab.f(SourceFile:302)
	at aly.a(SourceFile:51)

-- Block being ticked --
Details:
	Block type: ID #94 (tile.diode // aoi)
	Block data value: 2 / 0x2 / 0b0010
	Block location: World: (272,109,24), Chunk: (at 0,6,8 in 17,1; contains blocks 272,0,16 to 287,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Stacktrace:
	at iz.a(SourceFile:430)
	at iz.b(SourceFile:142)

-- Affected level --
Details:
	Level name: DMZ
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 452 Drop: 0
	Level seed: -4888510398596904624
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (191,64,64), Chunk: (at 15,4,0 in 11,4; contains blocks 176,0,64 to 191,255,79), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 19137653 game time, 49373 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 440 (now: false), thunder time: 8011 (now: true)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	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: Mac OS X (x86_64) version 10.8.3
	Java Version: 1.6.0_43, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 342709216 bytes (326 MB) / 581435392 bytes (554 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
	AABB Pool Size: 854967 (47878152 bytes; 45 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 2807 (157192 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.