Crash by generating new chunks

Minecraft Crash Report ----
// I let you down. Sorry 😞

Time: 4/21/15 3:13 PM
Description: Exception ticking world

java.lang.IllegalStateException: TickNextTick list out of synch
at le.a(SourceFile:495)
at le.c(SourceFile:199)
at net.minecraft.server.MinecraftServer.B(SourceFile:599)
at net.minecraft.server.MinecraftServer.A(SourceFile:535)
at bpo.A(SourceFile:152)
at net.minecraft.server.MinecraftServer.run(SourceFile:451)
at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:
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– Head –
Stacktrace:
at le.a(SourceFile:495)
at le.c(SourceFile:199)

– Affected level –
Details:
Level name: Scarce Resources
All players: 1 total; [lf['Wasthereonce'/195, l='Scarce Resources', x=-1722.98, y=75.00, z=-4974.03]]
Chunk stats: ServerChunkCache: 582 Drop: 0
Level seed: -4827595727671043601
Level generator: ID 04 - customized, ver 0. Features enabled: true
Level generator options: {"coordinateScale":684.412,"heightScale":684.412,"lowerLimitScale":512.0,"upperLimitScale":512.0,"depthNoiseScaleX":200.0,"depthNoiseScaleZ":200.0,"depthNoiseScaleExponent":0.5,"mainNoiseScaleX":80.0,"mainNoiseScaleY":160.0,"mainNoiseScaleZ":80.0,"baseSize":8.5,"stretchY":12.0,"biomeDepthWeight":1.0,"biomeDepthOffset":0.0,"biomeScaleWeight":1.0,"biomeScaleOffset":0.0,"seaLevel":40,"useCaves":true,"useDungeons":true,"dungeonChance":24,"useStrongholds":true,"useVillages":true,"useMineShafts":true,"useTemples":true,"useMonuments":true,"useRavines":true,"useWaterLakes":false,"waterLakeChance":1,"useLavaLakes":true,"lavaLakeChance":20,"useLavaOceans":false,"fixedBiome":-1,"biomeSize":3,"riverSize":3,"dirtSize":50,"dirtCount":40,"dirtMinHeight":0,"dirtMaxHeight":256,"gravelSize":50,"gravelCount":40,"gravelMinHeight":0,"gravelMaxHeight":256,"graniteSize":50,"graniteCount":40,"graniteMinHeight":0,"graniteMaxHeight":255,"dioriteSize":50,"dioriteCount":40,"dioriteMinHeight":0,"dioriteMaxHeight":255,"andesiteSize":50,"andesiteCount":40,"andesiteMinHeight":0,"andesiteMaxHeight":255,"coalSize":1,"coalCount":0,"coalMinHeight":0,"coalMaxHeight":0,"ironSize":1,"ironCount":0,"ironMinHeight":0,"ironMaxHeight":0,"goldSize":1,"goldCount":0,"goldMinHeight":0,"goldMaxHeight":0,"redstoneSize":1,"redstoneCount":0,"redstoneMinHeight":0,"redstoneMaxHeight":0,"diamondSize":3,"diamondCount":1,"diamondMinHeight":0,"diamondMaxHeight":16,"lapisSize":1,"lapisCount":0,"lapisCenterHeight":0,"lapisSpread":0}
Level spawn location: 124.00,41.00,248.00 - World: (124,41,248), Chunk: (at 12,2,8 in 7,15; contains blocks 112,0,240 to 127,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 5821215 game time, 9801767 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 23791 (now: false), thunder time: 12641 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.B(SourceFile:599)
at net.minecraft.server.MinecraftServer.A(SourceFile:535)
at bpo.A(SourceFile:152)
at net.minecraft.server.MinecraftServer.run(SourceFile:451)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 1.8.4
Operating System: Windows 8.1 (amd64) version 6.3
CPU: 8x AMD FX(tm)-8120 Eight-Core Processor
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 421333528 bytes (401 MB) / 986853376 bytes (941 MB) up to 2134114304 bytes (2035 MB)
JVM Flags: 7 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:PermSize=256M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 90
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [lf['Wasthereonce'/195, l='Scarce Resources', x=-1722.98, y=75.00, z=-4974.03]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.