Crash upon resuming a game (java.lang.NullPointerException: Batching chunks)

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 1/8/15 11:44 PM
Description: Batching chunks

java.lang.NullPointerException: Batching chunks
	at ckt.a(SourceFile:27)
	at ckt.compare(SourceFile:6)
	at java.util.PriorityQueue.siftDownUsingComparator(PriorityQueue.java:696)
	at java.util.PriorityQueue.siftDown(PriorityQueue.java:667)
	at java.util.PriorityQueue.poll(PriorityQueue.java:578)
	at java.util.AbstractQueue.remove(AbstractQueue.java:113)
	at ciu.a(SourceFile:78)
	at cop.a(SourceFile:245)
	at cop.b(SourceFile:171)
	at coh.a(SourceFile:78)
	at coh.run(SourceFile:38)
	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 ckt.a(SourceFile:27)
	at ckt.compare(SourceFile:6)
	at java.util.PriorityQueue.siftDownUsingComparator(PriorityQueue.java:696)
	at java.util.PriorityQueue.siftDown(PriorityQueue.java:667)
	at java.util.PriorityQueue.poll(PriorityQueue.java:578)
	at java.util.AbstractQueue.remove(AbstractQueue.java:113)
	at ciu.a(SourceFile:78)
	at cop.a(SourceFile:245)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [cin['bkntk'/169, l='MpServer', x=-213.70, y=55.00, z=38.55]]
	Chunk stats: MultiplayerChunkCache: 190, 190
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: 72.00,64.00,-64.00 - World: (72,64,-64), Chunk: (at 8,4,0 in 4,-4; contains blocks 64,0,-64 to 79,255,-49), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 26815 game time, 26815 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: survival (ID 0). Hardcore: true. Cheats: false
	Forced entities: 61 total; [afv['Skeleton'/279, l='MpServer', x=-209.16, y=23.00, z=-16.56], abr['Bat'/278, l='MpServer', x=-216.25, y=16.10, z=-27.25], afv['Skeleton'/283, l='MpServer', x=-216.50, y=22.00, z=-8.50], agh['Zombie'/282, l='MpServer', x=-216.50, y=18.00, z=-14.50], agh['Zombie'/281, l='MpServer', x=-223.50, y=22.00, z=-16.50], abr['Bat'/280, l='MpServer', x=-208.25, y=16.00, z=-21.25], acd['Rabbit'/285, l='MpServer', x=-217.81, y=64.00, z=8.03], acd['Rabbit'/284, l='MpServer', x=-218.66, y=64.00, z=-2.66], afv['Skeleton'/262, l='MpServer', x=-237.50, y=13.00, z=11.50], acd['Rabbit'/261, l='MpServer', x=-230.75, y=66.00, z=-1.50], agh['Zombie'/307, l='MpServer', x=-182.53, y=26.00, z=-41.16], abr['Bat'/309, l='MpServer', x=-178.44, y=18.69, z=9.28], afv['Skeleton'/308, l='MpServer', x=-183.50, y=25.00, z=-40.50], afv['Skeleton'/311, l='MpServer', x=-189.88, y=27.00, z=55.50], abr['Bat'/310, l='MpServer', x=-181.19, y=31.56, z=60.19], aeq['Creeper'/313, l='MpServer', x=-184.03, y=31.00, z=62.41], afv['Skeleton'/312, l='MpServer', x=-190.16, y=29.00, z=59.50], afv['Skeleton'/315, l='MpServer', x=-188.50, y=19.00, z=77.50], abr['Bat'/314, l='MpServer', x=-180.50, y=37.10, z=59.25], agh['Zombie'/317, l='MpServer', x=-178.50, y=21.00, z=81.50], agh['Zombie'/316, l='MpServer', x=-176.50, y=21.00, z=80.50], aeq['Creeper'/318, l='MpServer', x=-180.50, y=13.00, z=118.50], abr['Bat'/289, l='MpServer', x=-204.53, y=20.50, z=-40.31], afv['Skeleton'/293, l='MpServer', x=-201.50, y=14.00, z=-0.50], afv['Skeleton'/294, l='MpServer', x=-206.78, y=20.00, z=-12.44], afv['Skeleton'/295, l='MpServer', x=-198.66, y=26.00, z=57.63], aeq['Creeper'/296, l='MpServer', x=-199.41, y=26.00, z=51.97], afv['Skeleton'/297, l='MpServer', x=-203.09, y=40.00, z=56.63], aeq['Creeper'/298, l='MpServer', x=-205.09, y=47.00, z=70.44], aeq['Creeper'/299, l='MpServer', x=-206.50, y=59.00, z=80.50], agh['Zombie'/300, l='MpServer', x=-204.50, y=67.00, z=83.50], agh['Zombie'/342, l='MpServer', x=-142.66, y=43.00, z=69.34], aeq['Creeper'/341, l='MpServer', x=-144.94, y=38.00, z=114.34], agh['Zombie'/340, l='MpServer', x=-156.47, y=24.00, z=118.19], agh['Zombie'/339, l='MpServer', x=-156.50, y=24.00, z=116.50], acd['Rabbit'/338, l='MpServer', x=-154.50, y=71.00, z=105.50], acd['Rabbit'/337, l='MpServer', x=-157.66, y=72.00, z=106.34], acd['Rabbit'/336, l='MpServer', x=-156.66, y=71.00, z=105.34], cin['bkntk'/169, l='MpServer', x=-213.70, y=55.00, z=38.55], abr['Bat'/222, l='MpServer', x=-287.72, y=43.22, z=37.78], aeq['Creeper'/223, l='MpServer', x=-292.50, y=48.00, z=42.50], abr['Bat'/322, l='MpServer', x=-170.03, y=30.84, z=61.13], adx['item.item.rottenFlesh'/323, l='MpServer', x=-175.53, y=71.00, z=58.63], adx['item.item.rottenFlesh'/320, l='MpServer', x=-174.34, y=67.00, z=45.59], abr['Bat'/321, l='MpServer', x=-170.28, y=31.00, z=61.25], agc['Spider'/334, l='MpServer', x=-150.41, y=36.00, z=108.47], aeq['Creeper'/335, l='MpServer', x=-146.22, y=36.00, z=110.22], agh['Zombie'/332, l='MpServer', x=-151.66, y=30.00, z=100.34], agh['Zombie'/333, l='MpServer', x=-151.44, y=38.00, z=102.94], agc['Spider'/330, l='MpServer', x=-152.31, y=40.00, z=69.34], abr['Bat'/331, l='MpServer', x=-145.25, y=39.00, z=91.47], afv['Skeleton'/329, l='MpServer', x=-152.50, y=51.00, z=44.50], aeq['Creeper'/233, l='MpServer', x=-277.97, y=33.00, z=42.31], aeq['Creeper'/232, l='MpServer', x=-281.50, y=52.00, z=3.50], abr['Bat'/231, l='MpServer', x=-284.25, y=18.10, z=2.25], abr['Bat'/230, l='MpServer', x=-279.25, y=15.10, z=0.22], aeq['Creeper'/229, l='MpServer', x=-283.88, y=47.00, z=-15.81], afv['Skeleton'/228, l='MpServer', x=-274.50, y=27.00, z=-21.50], afv['Skeleton'/246, l='MpServer', x=-243.50, y=12.00, z=-4.50], agh['Zombie'/247, l='MpServer', x=-251.50, y=13.00, z=13.50], afv['Skeleton'/244, l='MpServer', x=-247.50, y=35.00, z=-34.50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at cem.a(SourceFile:308)
	at bss.b(SourceFile:2278)
	at coh.run(SourceFile:44)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 1.8.1
	Operating System: Linux (amd64) version 3.17.6-1-ARCH
	Java Version: 1.7.0_71, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 101907664 bytes (97 MB) / 386985984 bytes (369 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 1.8.1
	LWJGL: 2.9.1
	OpenGL: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
	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: No
	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)