Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-196453/

Crash:

java.lang.NullPointerException
	at agj.b(SourceFile:170)
	at agj.d(SourceFile:200)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 20.09.13 18:01
Description: Exception generating new chunk

java.lang.NullPointerException
	at agj.b(SourceFile:170)
	at agj.d(SourceFile:200)
	at km.c(SourceFile:72)
	at kl.<init>(SourceFile:28)
	at kk.a(SourceFile:209)
	at kk.a(SourceFile:246)
	at jh.a(SourceFile:151)
	at jh.a(SourceFile:369)
	at kq.b(SourceFile:353)
	at om.B(SourceFile:321)
	at pe.B(SourceFile:165)
	at om.h(SourceFile:284)
	at pe.h(SourceFile:1159)
	at vg.h(SourceFile:205)
	at kq.i(SourceFile:198)
	at kv.a(SourceFile:196)
	at gn.a(SourceFile:136)
	at eb.b(SourceFile:63)
	at kv.e(SourceFile:64)
	at ky.b(SourceFile:37)
	at bow.b(SourceFile:83)
	at net.minecraft.server.MinecraftServer.u(SourceFile:487)
	at net.minecraft.server.MinecraftServer.t(SourceFile:404)
	at bot.t(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:338)
	at jc.run(SourceFile:581)


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

-- Head --
Stacktrace:
	at agj.b(SourceFile:170)
	at agj.d(SourceFile:200)

-- Chunk to be generated --
Details:
	Location: -2,10
	Position hash: 47244640254
	Generator: HellRandomLevelSource
Stacktrace:
	at km.c(SourceFile:72)
	at kl.<init>(SourceFile:28)
	at kk.a(SourceFile:209)
	at kk.a(SourceFile:246)
	at jh.a(SourceFile:151)
	at jh.a(SourceFile:369)
	at kq.b(SourceFile:353)
	at om.B(SourceFile:321)
	at pe.B(SourceFile:165)
	at om.h(SourceFile:284)
	at pe.h(SourceFile:1159)
	at vg.h(SourceFile:205)

-- Player being ticked --
Details:
	Entity Type: null (kq)
	Entity ID: 2484
	Entity Name: serikst
	Entity's Exact location: -25,00, 77,50, 28,00
	Entity's Block location: World: (-25,77,28), Chunk: (at 7,4,12 in -2,1; contains blocks -32,0,16 to -17,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Entity's Momentum: 0,00, 0,00, 0,00
Stacktrace:
	at kq.i(SourceFile:198)
	at kv.a(SourceFile:196)
	at gn.a(SourceFile:136)
	at eb.b(SourceFile:63)
	at kv.e(SourceFile:64)

-- Ticking connection --
Details:
	Connection: kv@287cf889
Stacktrace:
	at ky.b(SourceFile:37)
	at bow.b(SourceFile:83)
	at net.minecraft.server.MinecraftServer.u(SourceFile:487)
	at net.minecraft.server.MinecraftServer.t(SourceFile:404)
	at bot.t(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:338)
	at jc.run(SourceFile:581)

-- System Details --
Details:
	Minecraft Version: 13w38b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_13, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 214491992 bytes (204 MB) / 449249280 bytes (428 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 2320 (129920 bytes; 0 MB) allocated, 2067 (115752 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 6846 (383376 bytes; 0 MB) allocated, 3038 (170128 bytes; 0 MB) used
	Player Count: 1 / 8; [kq['serikst'/2484, l='New World', x=-25,00, y=77,50, z=28,00]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-196453/12593115/