Hopper: java.lang.NullPointerException: Exception generating new chunk

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-963440/

Crash:

java.lang.NullPointerException: Exception generating new chunk
	at are.a(SourceFile:166)
	at are.d(SourceFile:196)

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

---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 9/01/14 17:09
Description: Exception generating new chunk

java.lang.NullPointerException: Exception generating new chunk
	at are.a(SourceFile:166)
	at are.d(SourceFile:196)
	at na.c(SourceFile:86)
	at mz.<init>(SourceFile:36)
	at my.a(SourceFile:228)
	at my.a(SourceFile:265)
	at lv.a(SourceFile:166)
	at lv.c(SourceFile:218)
	at lv.a(SourceFile:107)
	at nv.c(SourceFile:87)
	at nv.a(SourceFile:52)
	at et.a(SourceFile:168)
	at nk.c(SourceFile:135)
	at net.minecraft.server.MinecraftServer.u(SourceFile:546)
	at net.minecraft.server.MinecraftServer.t(SourceFile:462)
	at bvc.t(SourceFile:123)
	at net.minecraft.server.MinecraftServer.run(SourceFile:380)
	at lr.run(SourceFile:648)


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

-- Head --
Stacktrace:
	at are.a(SourceFile:166)
	at are.d(SourceFile:196)

-- Chunk to be generated --
Details:
	Location: -31,18
	Position hash: 81604378593
	Generator: RandomLevelSource
Stacktrace:
	at na.c(SourceFile:86)
	at mz.<init>(SourceFile:36)
	at my.a(SourceFile:228)
	at my.a(SourceFile:265)
	at lv.a(SourceFile:166)
	at lv.c(SourceFile:218)
	at lv.a(SourceFile:107)
	at nv.c(SourceFile:87)
	at nv.a(SourceFile:52)
	at et.a(SourceFile:168)

-- Ticking connection --
Details:
	Connection: et@18241b10
Stacktrace:
	at nk.c(SourceFile:135)
	at net.minecraft.server.MinecraftServer.u(SourceFile:546)
	at net.minecraft.server.MinecraftServer.t(SourceFile:462)
	at bvc.t(SourceFile:123)
	at net.minecraft.server.MinecraftServer.run(SourceFile:380)
	at lr.run(SourceFile:648)

-- System Details --
Details:
	Minecraft Version: 14w02b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 510674624 bytes (487 MB) / 718405632 bytes (685 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	IntCache: cache: 7, tcache: 28, allocated: 14, tallocated: 126
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [ne['TheDavtax'/8697, l='New World', x=-227,50, y=60,00, z=243,50]]
	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-963440/47051890/