---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 02/09/15 12:04
Description: Exception ticking world

java.lang.IllegalStateException: TickNextTick list out of synch
at ll.a(SourceFile:557)
at ll.d(SourceFile:225)
at net.minecraft.server.MinecraftServer.D(SourceFile:617)
at net.minecraft.server.MinecraftServer.C(SourceFile:553)
at bvd.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:457)
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 ll.a(SourceFile:557)
at ll.d(SourceFile:225)

– Affected level –
Details:
Level name: Survival
All players: 1 total; [ln['gardeljunior'/303, l='Survival', x=27,59, y=63,00, z=191,44]]
Chunk stats: ServerChunkCache: 342 Drop: 0
Level seed: -6805103514463719360
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: -4,00,64,00,256,00 - World: (-4,64,256), Chunk: (at 12,4,0 in -1,16; contains blocks -16,0,256 to -1,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 1845408 game time, 1996254 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 63556 (now: false), thunder time: 62640 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.D(SourceFile:617)
at net.minecraft.server.MinecraftServer.C(SourceFile:553)
at bvd.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:457)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 15w36a
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_60, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 79929048 bytes (76 MB) / 456654848 bytes (435 MB) up to 1908932608 bytes (1820 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [ln['gardeljunior'/303, l='Survival', x=27,59, y=63,00, z=191,44]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.