[15:13:58] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.IllegalArgumentException: n must be positive
        at java.util.Random.nextInt(Random.java:300) ~[?:1.7.0_25]
        at net.minecraft.server.v1_7_R1.BiomeDecorator.a(BiomeDecorator.java:156) ~[spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.BiomeDecorator.a(BiomeDecorator.java:83) ~[spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.BiomeBase.a(SourceFile:362) ~[spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.ChunkProviderGenerate.getChunkAt(SourceFile:432) ~[spigot.jar:git-Spigot-1225]
        at org.bukkit.craftbukkit.v1_7_R1.generator.NormalChunkGenerator.getChunkAt(NormalChunkGenerator.java:49) ~[spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:228) ~[spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.Chunk.a(Chunk.java:876) ~[spigot.jar:git-Spigot-1225]
        at org.bukkit.craftbukkit.v1_7_R1.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:61) ~[spigot.jar:git-Spigot-1225]
        at org.bukkit.craftbukkit.v1_7_R1.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:13) ~[spigot.jar:git-Spigot-1225]
        at org.bukkit.craftbukkit.v1_7_R1.util.AsynchronousExecutor$Task.finish(AsynchronousExecutor.java:179) ~[spigot.jar:git-Spigot-1225]
        at org.bukkit.craftbukkit.v1_7_R1.util.AsynchronousExecutor.finishActive(AsynchronousExecutor.java:287) ~[spigot.jar:git-Spigot-1225]
        at org.bukkit.craftbukkit.v1_7_R1.chunkio.ChunkIOExecutor.tick(ChunkIOExecutor.java:30) ~[spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:592) ~[spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:273) ~[spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:540) ~[spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:446) [spigot.jar:git-Spigot-1225]
        at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Spigot-1225]
[15:13:58] [Server thread/ERROR]: This crash report has been saved to: /home/nemesispvp/server/./crash-reports/crash-2014-01-01_15.13.58-server.txt