---- Minecraft Crash Report ----
// There are four lights!

Time: 12.10.15 7:55
Description: Exception ticking world

java.lang.ClassCastException: air cannot be cast to ajv
	at avo$c.a(SourceFile:1716)
	at avl.a(SourceFile:42)
	at avh.a(SourceFile:94)
	at asm.b(SourceFile:165)
	at arj.a(SourceFile:802)
	at arj.a(SourceFile:784)
	at ln.d(SourceFile:115)
	at lt.a(SourceFile:85)
	at lu.c(SourceFile:143)
	at lo.d(SourceFile:207)
	at net.minecraft.server.MinecraftServer.D(SourceFile:610)
	at net.minecraft.server.MinecraftServer.C(SourceFile:546)
	at bvw.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:450)
	at java.lang.Thread.run(Unknown Source)


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

-- Head --
Stacktrace:
	at avo$c.a(SourceFile:1716)
	at avl.a(SourceFile:42)
	at avh.a(SourceFile:94)
	at asm.b(SourceFile:165)
	at arj.a(SourceFile:802)
	at arj.a(SourceFile:784)
	at ln.d(SourceFile:115)
	at lt.a(SourceFile:85)
	at lu.c(SourceFile:143)
	at lo.d(SourceFile:207)

-- Affected level --
Details:
	Level name: snapshot tests
	All players: 1 total; [lq['mc_Dandy'/136, l='snapshot tests', x=-1517,55, y=64,00, z=2147,84]]
	Chunk stats: ServerChunkCache: 889 Drop: 0
	Level seed: -8787608463459405337
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 3;minecraft:bedrock,59*minecraft:stone,3*minecraft:dirt,minecraft:grass;1;stronghold,biome_1,village,decoration,dungeon,lake,mineshaft,lava_lake
	Level spawn location: World: (-1414,4,2048), Chunk: (at 10,0,0 in -89,128; contains blocks -1424,0,2048 to -1409,255,2063), Region: (-3,4; contains chunks -96,128 to -65,159, blocks -1536,0,2048 to -1025,255,2559)
	Level time: 991896 game time, 120192 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 17582 (now: false), thunder time: 24893 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:610)
	at net.minecraft.server.MinecraftServer.C(SourceFile:546)
	at bvw.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:450)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 15w41b
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_60, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 78359240 bytes (74 MB) / 271761408 bytes (259 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; [lq['mc_Dandy'/136, l='snapshot tests', x=-1517,55, y=64,00, z=2147,84]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.