2013-05-20 15:57:48 [Information] [STDERR] net.minecraft.util.ReportedException: Exception while ticking a block
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:647)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:571)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:127)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:469)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
2013-05-20 15:57:48 [Information] [STDERR] Caused by: java.lang.NullPointerException
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.world.chunk.Chunk.setBlockIDWithMetadata(Chunk.java:762)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.world.World.setBlock(World.java:555)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.block.BlockFlowing.updateFlow(BlockFlowing.java:39)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.block.BlockFlowing.updateTick(BlockFlowing.java:135)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.world.WorldServer.tickUpdates(WorldServer.java:613)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.world.WorldServer.tick(WorldServer.java:195)
2013-05-20 15:57:48 [Information] [STDERR] 	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:641)
2013-05-20 15:57:48 [Information] [STDERR] 	... 4 more
2013-05-20 15:57:48 [Schwerwiegend] [Minecraft-Server] Encountered an unexpected exception ReportedException
net.minecraft.util.ReportedException: Exception while ticking a block
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:647)
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:571)
	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:127)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:469)
	at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
Caused by: java.lang.NullPointerException
	at net.minecraft.world.chunk.Chunk.setBlockIDWithMetadata(Chunk.java:762)
	at net.minecraft.world.World.setBlock(World.java:555)
	at net.minecraft.block.BlockFlowing.updateFlow(BlockFlowing.java:39)
	at net.minecraft.block.BlockFlowing.updateTick(BlockFlowing.java:135)
	at net.minecraft.world.WorldServer.tickUpdates(WorldServer.java:613)
	at net.minecraft.world.WorldServer.tick(WorldServer.java:195)
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:641)
	... 4 more