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---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 2/16/14 1:29 PM
Description: Exception getting block type in world

java.lang.IllegalArgumentException: n must be positive
at java.util.Random.nextInt(Unknown Source)
at agr.a(SourceFile:122)
at agr.a(SourceFile:27)
at agl.a(SourceFile:364)
at ahn.a(SourceFile:84)
at apq.a(SourceFile:432)
at ml.a(SourceFile:160)
at aoo.a(SourceFile:775)
at ml.c(SourceFile:95)
at ml.d(SourceFile:108)
at afs.e(SourceFile:311)
at afs.a(SourceFile:249)
at afs.a(SourceFile:1720)
at agf.a(SourceFile:153)
at agf.a(SourceFile:101)
at mm.b(SourceFile:117)
at net.minecraft.server.MinecraftServer.u(SourceFile:502)
at net.minecraft.server.MinecraftServer.t(SourceFile:440)
at btk.t(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:357)
at lb.run(SourceFile:616)


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

-- Head --
Stacktrace:
at java.util.Random.nextInt(Unknown Source)
at agr.a(SourceFile:122)
at agr.a(SourceFile:27)
at agl.a(SourceFile:364)
at ahn.a(SourceFile:84)
at apq.a(SourceFile:432)
at ml.a(SourceFile:160)
at aoo.a(SourceFile:775)
at ml.c(SourceFile:95)
at ml.d(SourceFile:108)
at afs.e(SourceFile:311)

-- Requested block coordinates --
Details:
Found chunk: true
Location: World: (52,71,-226), Chunk: (at 4,4,14 in 3,-15; contains blocks 48,0,-240 to 63,255,-225), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Stacktrace:
at afs.a(SourceFile:249)
at afs.a(SourceFile:1720)
at agf.a(SourceFile:153)
at agf.a(SourceFile:101)
at mm.b(SourceFile:117)

-- Affected level --
Details:
Level name: SUPAHFUNWORLD!
All players: 1 total; [mp['masterfireheart'/122, l='SUPAHFUNWORLD!', x=119.55, y=106.50, z=-99.68]]
Chunk stats: ServerChunkCache: 665 Drop: 0
Level seed: -8438095853566844928
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (188,100,13), Chunk: (at 12,6,13 in 11,0; contains blocks 176,0,0 to 191,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 2122 game time, 7082 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 125792 (now: false), thunder time: 168064 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.u(SourceFile:502)
at net.minecraft.server.MinecraftServer.t(SourceFile:440)
at btk.t(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:357)
at lb.run(SourceFile:616)

-- System Details --
Details:
Minecraft Version: 1.7.4
Operating System: Windows 8 (x86) version 6.2
Java Version: 1.7.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 66163568 bytes (63 MB) / 162050048 bytes (154 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
AABB Pool Size: 1673 (93688 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Vec3 Pool Size: 219 (12264 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [mp['masterfireheart'/122, l='SUPAHFUNWORLD!', x=119.55, y=106.50, z=-99.68]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.