---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 15-11-15 20:43
Description: Exception while updating neighbours

java.lang.IllegalArgumentException: Cannot get property arg{name=shape, clazz=class ajh$b, values=[north_south, east_west, ascending_east, ascending_west, ascending_north, ascending_south]} as it does not exist in aqu{block=minecraft:unpowered_comparator, properties=[facing, mode, powered]}
	at aqu$a.c(SourceFile:165)
	at ane.a(SourceFile:115)
	at ane.a(SourceFile:99)
	at ane.b(SourceFile:136)
	at ajh.a(SourceFile:454)
	at ahm.e(SourceFile:447)
	at akj.h(SourceFile:208)
	at akd.k(SourceFile:225)
	at akd.b(SourceFile:235)
	at lp.a(SourceFile:646)
	at lp.d(SourceFile:215)
	at net.minecraft.server.MinecraftServer.D(SourceFile:616)
	at net.minecraft.server.MinecraftServer.C(SourceFile:552)
	at bxw.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:456)
	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 aqu$a.c(SourceFile:165)
	at ane.a(SourceFile:115)
	at ane.a(SourceFile:99)
	at ane.b(SourceFile:136)
	at ajh.a(SourceFile:454)

-- Block being updated --
Details:
	Source block type: ID #149 (tile.comparator // akd)
	Block: minecraft:golden_rail[powered=true,shape=north_south]
	Block location: World: (-101,58,24), Chunk: (at 11,3,8 in -7,1; contains blocks -112,0,16 to -97,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Stacktrace:
	at ahm.e(SourceFile:447)
	at akj.h(SourceFile:208)
	at akd.k(SourceFile:225)
	at akd.b(SourceFile:235)

-- Block being ticked --
Details:
	Block: minecraft:unpowered_comparator[facing=south,mode=compare,powered=true]
	Block location: World: (-101,58,25), Chunk: (at 11,3,9 in -7,1; contains blocks -112,0,16 to -97,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Stacktrace:
	at lp.a(SourceFile:646)
	at lp.d(SourceFile:215)

-- Affected level --
Details:
	Level name: superflat
	All players: 1 total; [lr['ygg3r'/14, l='superflat', x=-103,06, y=58,75, z=24,21]]
	Chunk stats: ServerChunkCache: 625 Drop: 0
	Level seed: -2569199106250757278
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 3;minecraft:bedrock,3*minecraft:stone,52*minecraft:sandstone;2;
	Level spawn location: World: (-124,4,44), Chunk: (at 4,0,12 in -8,2; contains blocks -128,0,32 to -113,255,47), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 3511542 game time, 1000 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:616)
	at net.minecraft.server.MinecraftServer.C(SourceFile:552)
	at bxw.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:456)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 15w46a
	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: 323706488 bytes (308 MB) / 485363712 bytes (462 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; [lr['ygg3r'/14, l='superflat', x=-103,06, y=58,75, z=24,21]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.