---- Minecraft Crash Report ----
// Why did you do that?

Time: 06.10.16 21:55
Description: Ticking block entity

java.lang.IllegalArgumentException: Cannot get property att{name=facing, clazz=class cv, values=[down, up, north, south, west, east]} as it does not exist in ath{block=minecraft:air, properties=[]}
	at ath$a.c(SourceFile:166)
	at ata.j(SourceFile:102)
	at ata.a(SourceFile:92)
	at ata.f(SourceFile:110)
	at ata.F_(SourceFile:233)
	at ajn.k(SourceFile:1429)
	at ben.t(SourceFile:1649)
	at ben.av(SourceFile:967)
	at ben.a(SourceFile:395)
	at net.minecraft.client.main.Main.main(SourceFile:124)


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

-- Head --
Thread: Client thread
Stacktrace:
	at ath$a.c(SourceFile:166)
	at ata.j(SourceFile:102)
	at ata.a(SourceFile:92)
	at ata.f(SourceFile:110)
	at ata.F_(SourceFile:233)

-- Block entity being ticked --
Details:
	Name: minecraft:piston // ata
	Block type: ID #36 (tile.null // asz)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (6,17,-13), Chunk: (at 6,1,3 in 0,-1; contains blocks 0,0,-16 to 15,255,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Actual block type: ID #36 (tile.null // asz)
	Actual block data value: 5 / 0x5 / 0b0101
Stacktrace:
	at ajn.k(SourceFile:1429)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bpn['Meridiana'/608209, l='MpServer', x=3,51, y=25,56, z=-34,22]]
	Chunk stats: MultiplayerChunkCache: 961, 961
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (8,4,8), Chunk: (at 8,0,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 10010 game time, 10010 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 1 total; [bpn['Meridiana'/608209, l='MpServer', x=3,51, y=25,56, z=-34,22]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bnl.a(SourceFile:365)
	at ben.b(SourceFile:2536)
	at ben.a(SourceFile:404)
	at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
	Minecraft Version: 16w40a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_101, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 226319584 bytes (215 MB) / 789577728 bytes (753 MB) up to 3817865216 bytes (3641 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 16w40a
	LWJGL: 2.9.4
	OpenGL: GeForce GTX 780/PCIe/SSE2 GL version 4.5.0 NVIDIA 368.69, NVIDIA Corporation
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

	Using VBOs: Yes
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: 
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	CPU: 8x Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz