---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 9/2/15 6:10 PM
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(Thread.java:745)

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: Area 15
All players: 1 total; [ln['JustForFunLTU'/291, l='Area 15', x=-992.58, y=99.00, z=362.07]]
Chunk stats: ServerChunkCache: 996 Drop: 0
Level seed: 6915673020853612258
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: -188.00,64.00,240.00 - World: (-188,64,240), Chunk: (at 4,4,0 in -12,15; contains blocks -192,0,240 to -177,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 123580 game time, 38855 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 17482 (now: false), thunder time: 130527 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
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(Thread.java:745)

– System Details –
Details:
Minecraft Version: 15w36a
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: 155212136 bytes (148 MB) / 479313920 bytes (457 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: 13, tallocated: 95
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [ln['JustForFunLTU'/291, l='Area 15', x=-992.58, y=99.00, z=362.07]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.