apocalyptic crash

---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 4/02/14 16:21
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
	at net.cyberninjapiggy.apocalyptic.generator.RavagedChunkGenerator.getDefaultPopulators(RavagedChunkGenerator.java:233)
	at net.minecraft.server.v1_7_R1.MinecraftServer.a(MinecraftServer.java:259)
	at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:175)
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424)
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617)


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

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 129705120 bytes (123 MB) / 208732160 bytes (199 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 1 total; -Xmx1024M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	CraftBukkit Information:
   Running: CraftBukkit version git-Bukkit-1.7.2-R0.2-b2974jnks (MC: 1.7.2) (Implementing API version 1.7.2-R0.2) true
   Plugins: { Multiverse-Core v2.4-b527 com.onarandombox.MultiverseCore.MultiverseCore [Rigby, fernferret, lithium3141, main--], SQLibrary v7.1 lib.PatPeter.SQLibrary.SQLibrary [PatPeter], Apocalyptic v2.3.4 net.cyberninjapiggy.apocalyptic.Apocalyptic [awesomefacecreeper],}
   Warnings: DEFAULT
   Threads: { RUNNABLE Attach Listener: [], WAITING Reference Handler: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:503), java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)], WAITING Finalizer: [java.lang.Object.wait(Native Method), java.lang.ref.ReferenceQueue.remove(Unknown Source), java.lang.ref.ReferenceQueue.remove(Unknown Source), java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)], WAITING Snooper Timer: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:503), java.util.TimerThread.mainLoop(Unknown Source), java.util.TimerThread.run(Unknown Source)], RUNNABLE DestroyJavaVM: [], RUNNABLE Signal Dispatcher: [], TIMED_WAITING Server Infinisleeper: [java.lang.Thread.sleep(Native Method), net.minecraft.server.v1_7_R1.ThreadSleepForever.run(SourceFile:62)], RUNNABLE Server thread: [java.lang.Thread.dumpThreads(Native Method), java.lang.Thread.getAllStackTraces(Unknown Source), org.bukkit.craftbukkit.v1_7_R1.CraftCrashReport.call(CraftCrashReport.java:28), net.minecraft.server.v1_7_R1.CrashReportSystemDetails.a(SourceFile:74), net.minecraft.server.v1_7_R1.CrashReport.h(CrashReport.java:45), net.minecraft.server.v1_7_R1.CrashReport.<init>(CrashReport.java:33), net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:474), net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617)], RUNNABLE Netty IO #0: [sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method), sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source), sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source), sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source), sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source), sun.nio.ch.SelectorImpl.select(Unknown Source), net.minecraft.util.io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:591), net.minecraft.util.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:301), net.minecraft.util.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101), java.lang.Thread.run(Unknown Source)], RUNNABLE Thread-5: [java.io.FileOutputStream.writeBytes(Native Method), java.io.FileOutputStream.write(Unknown Source), java.io.BufferedOutputStream.flushBuffer(Unknown Source), java.io.BufferedOutputStream.flush(Unknown Source), java.io.PrintStream.write(Unknown Source), org.fusesource.jansi.AnsiOutputStream.write(AnsiOutputStream.java:82), java.io.FilterOutputStream.write(Unknown Source), java.io.PrintStream.write(Unknown Source), java.io.FilterOutputStream.write(Unknown Source), org.bukkit.craftbukkit.v1_7_R1.util.TerminalConsoleWriterThread.run(TerminalConsoleWriterThread.java:34), java.lang.Thread.run(Unknown Source)], TIMED_WAITING Keep-Alive-Timer: [java.lang.Thread.sleep(Native Method), sun.net.www.http.KeepAliveCache.run(Unknown Source), java.lang.Thread.run(Unknown Source)], RUNNABLE Server console handler: [org.fusesource.jansi.internal.Kernel32._getch(Native Method), org.fusesource.jansi.internal.WindowsSupport.readByte(WindowsSupport.java:46), org.bukkit.craftbukkit.libs.jline.WindowsTerminal.readByte(WindowsTerminal.java:184), org.bukkit.craftbukkit.libs.jline.WindowsTerminal.access$000(WindowsTerminal.java:53), org.bukkit.craftbukkit.libs.jline.WindowsTerminal$1.read(WindowsTerminal.java:151), java.io.FilterInputStream.read(Unknown Source), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader$1.read(ConsoleReader.java:167), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:267), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:204), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readCharacter(ConsoleReader.java:995), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readLine(ConsoleReader.java:1167), net.minecraft.server.v1_7_R1.ThreadCommandReader.run(ThreadCommandReader.java:32)],}
   Recent tasks from -31--1{}
	Profiler Position: N/A (disabled)
	Player Count: 0 / 20; []
	Is Modded: Definitely; Server brand changed to 'CraftBukkit'
	Type: Dedicated Server (map_server.txt)