When I try to register and run a class implementing IWorldGenerator minecraft crashes when loading any new chuncks.

 

Here is how I handle the Generator code in my main mod file

 

public static EventManager eventManager;

...

@EventHandler
    public void preInit(FMLPreInitializationEvent event)
    {

...

GameRegistry.registerWorldGenerator(eventManager, 0);
        

    }

 

 

Here is the EventManager class I made implementing IWorldGenerator

 

public class EventManager implements IWorldGenerator{


public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider)
    {
        switch (world.provider.dimensionId)
        {
        case -1:
            generateNether(world, random, chunkX * 16, chunkZ * 16);
        case 0:
            generateSurface(world, random, chunkX * 16, chunkZ * 16);
        case 1:
            generateEnd(world, random, chunkX * 16, chunkZ * 16);
        }
    }

    private void generateEnd(World world, Random random, int x, int z)
    {

    }

    private void generateSurface(World world, Random random, int x, int z)
    {
        
    }

    private void generateNether(World world, Random random, int chunk_X, int chunk_Z)
    {
    	


    }

}

 

 

The stack trace starts with this.

 

 

 

 

[13:57:43] [server thread/INFO]: Loading dimension 0 (New World) (net.minecraft.server.integrated.IntegratedServer@63376b5e)

[13:57:43] [server thread/INFO]: Loading dimension 1 (New World) (net.minecraft.server.integrated.IntegratedServer@63376b5e)

[13:57:43] [server thread/INFO]: Loading dimension -1 (New World) (net.minecraft.server.integrated.IntegratedServer@63376b5e)

[13:57:43] [server thread/INFO]: Preparing start region for level 0

[13:57:44] [server thread/ERROR]: Encountered an unexpected exception

java.lang.NullPointerException: at index 0

at com.google.common.collect.ObjectArrays.checkElementNotNull(ObjectArrays.java:240) ~[guava-15.0.jar:?]

at com.google.common.collect.ObjectArrays.checkElementsNotNull(ObjectArrays.java:231) ~[guava-15.0.jar:?]

at com.google.common.collect.ObjectArrays.checkElementsNotNull(ObjectArrays.java:226) ~[guava-15.0.jar:?]

at com.google.common.collect.ImmutableList.construct(ImmutableList.java:303) ~[guava-15.0.jar:?]

at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:258) ~[guava-15.0.jar:?]

at cpw.mods.fml.common.registry.GameRegistry.computeSortedGeneratorList(GameRegistry.java:116) ~[GameRegistry.class:?]

at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:91) ~[GameRegistry.class:?]

at net.minecraft.world.gen.ChunkProviderServer.populate(ChunkProviderServer.java:256) ~[ChunkProviderServer.class:?]

at net.minecraft.world.chunk.Chunk.populateChunk(Chunk.java:1177) ~[Chunk.class:?]

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:150) ~[ChunkProviderServer.class:?]

at net.minecraft.server.MinecraftServer.initialWorldChunkLoad(MinecraftServer.java:353) ~[MinecraftServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:81) ~[integratedServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:98) ~[integratedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:488) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:787) [MinecraftServer$2.class:?]

[13:57:44] [server thread/ERROR]: This crash report has been saved to: C:\Users\Chris\Desktop\Java Workspace\minecraft\1.7.2\Forge\.\crash-reports\crash-2014-02-09_13.57.44-server.txt

[13:57:44] [server thread/INFO]: Stopping server

[13:57:44] [server thread/INFO]: Saving players

[13:57:44] [server thread/INFO]: Saving worlds

[13:57:44] [server thread/INFO]: Saving chunks for level 'New World'/Overworld

[13:57:44] [server thread/INFO]: Saving chunks for level 'New World'/Nether

[13:57:44] [server thread/INFO]: Saving chunks for level 'New World'/The End

[13:57:44] [server thread/INFO]: Unloading dimension 0

[13:57:44] [server thread/INFO]: Unloading dimension -1

[13:57:44] [server thread/INFO]: Unloading dimension 1

[13:57:44] [server thread/INFO]: The state engine was in incorrect state SERVER_STARTING and forced into state SERVER_STOPPED. Errors may have been discarded.

---- Minecraft Crash Report ----

// You're mean.

 

Time: 2/9/14 1:57 PM

Description: Exception in server tick loop

 

java.lang.NullPointerException: at index 0

at com.google.common.collect.ObjectArrays.checkElementNotNull(ObjectArrays.java:240)

at com.google.common.collect.ObjectArrays.checkElementsNotNull(ObjectArrays.java:231)

at com.google.common.collect.ObjectArrays.checkElementsNotNull(ObjectArrays.java:226)

at com.google.common.collect.ImmutableList.construct(ImmutableList.java:303)

at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:258)

at cpw.mods.fml.common.registry.GameRegistry.computeSortedGeneratorList(GameRegistry.java:116)

at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:91)

at net.minecraft.world.gen.ChunkProviderServer.populate(ChunkProviderServer.java:256)

at net.minecraft.world.chunk.Chunk.populateChunk(Chunk.java:1177)

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:150)

at net.minecraft.server.MinecraftServer.initialWorldChunkLoad(MinecraftServer.java:353)

at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:81)

at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:98)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:488)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:787)

 

 

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_45, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 576316904 bytes (549 MB) / 727187456 bytes (693 MB) up to 1897922560 bytes (1810 MB)

JVM Flags: 0 total;

AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94

FML: MCP v9.01-pre FML v7.2.48.997 Minecraft Forge 10.12.0.997 5 mods loaded, 5 mods active

mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

FML{7.2.48.997} [Forge Mod Loader] (forgeSrc-1.7.2-10.12.0.997.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

Forge{10.12.0.997} [Minecraft Forge] (forgeSrc-1.7.2-10.12.0.997.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

examplemod{1.0} [Example Mod] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

tutorial{1.0} [tutorial] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

Profiler Position: N/A (disabled)

Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

Player Count: 0 / 8; []

Type: Integrated Server (map_client.txt)

Is Modded: Definitely; Client brand changed to 'fml,forge'

#@!@# Game crashed! Crash report saved to: #@!@# .\crash-reports\crash-2014-02-09_13.57.44-server.txt

[13:57:44] [Client Shutdown Thread/INFO]: Stopping server

AL lib: (EE) alc_cleanup: 1 device not closed

 

 

 

 

 

public static EventManager eventManager;

eventManager is null.