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

Time: 10/22/15 12:24 AM
Description: Ticking block entity

java.lang.IllegalArgumentException
	at ot.a(SourceFile:18)
	at ot.a(SourceFile:37)
	at agz.i(SourceFile:130)
	at agz.c(SourceFile:117)
	at apy.c(SourceFile:62)
	at ahi.k(SourceFile:1384)
	at lq.k(SourceFile:544)
	at net.minecraft.server.MinecraftServer.D(SourceFile:618)
	at net.minecraft.server.MinecraftServer.C(SourceFile:546)
	at bxi.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:450)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Stacktrace:
	at ot.a(SourceFile:18)
	at ot.a(SourceFile:37)
	at agz.i(SourceFile:130)
	at agz.c(SourceFile:117)
	at apy.c(SourceFile:62)

-- Block entity being ticked --
Details:
	Name: MobSpawner // apy
	Block type: ID #52 (tile.mobSpawner // amg)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (-1196,5,626), Chunk: (at 4,0,2 in -75,39; contains blocks -1200,0,624 to -1185,255,639), Region: (-3,1; contains chunks -96,32 to -65,63, blocks -1536,0,512 to -1025,255,1023)
	Actual block type: ID #52 (tile.mobSpawner // amg)
	Actual block data value: 0 / 0x0 / 0b0000
Stacktrace:
	at ahi.k(SourceFile:1384)
	at lq.k(SourceFile:544)

-- Affected level --
Details:
	Level name: ONLY FOR 1.9 SNAPSHOOTS
	All players: 1 total; [ls['TJGreenough'/174, l='ONLY FOR 1.9 SNAPSHOOTS', x=-1193.44, y=5.75, z=625.97]]
	Chunk stats: ServerChunkCache: 657 Drop: 0
	Level seed: 3416202936764524666
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-1299,4,573), Chunk: (at 13,0,13 in -82,35; contains blocks -1312,0,560 to -1297,255,575), Region: (-3,1; contains chunks -96,32 to -65,63, blocks -1536,0,512 to -1025,255,1023)
	Level time: 4645597 game time, 6000 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 1 (now: false), thunder time: 1 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:618)
	at net.minecraft.server.MinecraftServer.C(SourceFile:546)
	at bxi.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:450)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 15w43a
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 123428608 bytes (117 MB) / 319574016 bytes (304 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [ls['TJGreenough'/174, l='ONLY FOR 1.9 SNAPSHOOTS', x=-1193.44, y=5.75, z=625.97]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.