I need help with my world generator.

I want to generate ores, but it crashes, as soon as it tries to generate new chunks.

Here is my error report:

 

[17:30:10] [server thread/ERROR]: Encountered an unexpected exception

java.lang.NullPointerException

at net.minecraft.world.chunk.storage.ExtendedBlockStorage.func_150818_a(ExtendedBlockStorage.java:86) ~[ExtendedBlockStorage.class:?]

at net.minecraft.world.chunk.Chunk.func_150807_a(Chunk.java:653) ~[Chunk.class:?]

at net.minecraft.world.World.setBlock(World.java:519) ~[World.class:?]

at net.minecraft.world.gen.feature.WorldGenMinable.generate(WorldGenMinable.java:79) ~[WorldGenMinable.class:?]

at com.alloys.world.WorldGen.addOre(WorldGen.java:35) ~[WorldGen.class:?]

at com.alloys.world.WorldGen.genNormal(WorldGen.java:23) ~[WorldGen.class:?]

at com.alloys.world.WorldGen.generate(WorldGen.java:18) ~[WorldGen.class:?]

at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106) ~[GameRegistry.class:?]

at net.minecraft.world.gen.ChunkProviderServer.populate(ChunkProviderServer.java:314) ~[ChunkProviderServer.class:?]

at net.minecraft.world.chunk.Chunk.populateChunk(Chunk.java:1157) ~[Chunk.class:?]

at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:208) ~[ChunkProviderServer.class:?]

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:149) ~[ChunkProviderServer.class:?]

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:119) ~[ChunkProviderServer.class:?]

at net.minecraft.server.MinecraftServer.initialWorldChunkLoad(MinecraftServer.java:305) ~[MinecraftServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:79) ~[integratedServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:96) ~[integratedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:752) [MinecraftServer$2.class:?]

[17:30:10] [server thread/ERROR]: This crash report has been saved to: C:\Users\Ian\Desktop\forge\alloymod\eclipse\.\crash-reports\crash-2015-06-25_17.30.10-server.txt

[17:30:10] [server thread/INFO] [FML]: Applying holder lookups

[17:30:10] [server thread/INFO] [FML]: Holder lookups applied

[17:30:10] [server thread/INFO] [FML]: The state engine was in incorrect state SERVER_STARTING and forced into state SERVER_STOPPED. Errors may have been discarded.

[17:30:11] [Client thread/INFO] [sTDOUT]: [net.minecraft.client.Minecraft:displayCrashReport:388]: ---- Minecraft Crash Report ----

// You should try our sister game, Minceraft!

 

Time: 25.06.15 17:30

Description: Exception in server tick loop

 

java.lang.NullPointerException: Exception in server tick loop

at net.minecraft.world.chunk.storage.ExtendedBlockStorage.func_150818_a(ExtendedBlockStorage.java:86)

at net.minecraft.world.chunk.Chunk.func_150807_a(Chunk.java:653)

at net.minecraft.world.World.setBlock(World.java:519)

at net.minecraft.world.gen.feature.WorldGenMinable.generate(WorldGenMinable.java:79)

at com.alloys.world.WorldGen.addOre(WorldGen.java:35)

at com.alloys.world.WorldGen.genNormal(WorldGen.java:23)

at com.alloys.world.WorldGen.generate(WorldGen.java:18)

at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)

at net.minecraft.world.gen.ChunkProviderServer.populate(ChunkProviderServer.java:314)

at net.minecraft.world.chunk.Chunk.populateChunk(Chunk.java:1157)

at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:208)

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:149)

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:119)

at net.minecraft.server.MinecraftServer.initialWorldChunkLoad(MinecraftServer.java:305)

at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:79)

at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:96)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:752)

 

 

package com.alloys.world;

import java.util.Random; 

import com.alloys.tile.ModBlocks;

import net.minecraft.block.Block;
import net.minecraft.init.Blocks;
import net.minecraft.world.World;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.feature.WorldGenMinable;
import cpw.mods.fml.common.IWorldGenerator;

public class WorldGen implements IWorldGenerator {

@Override
public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider) {
	genNormal(world, random, chunkX * 16, chunkZ * 16);
}

private void genNormal(World world, Random rand, int x, int z) {
	this.addOre(ModBlocks.corundum_ore_gre, world, rand, x, z, 10, 100, 100, 5, 30);
}


public void addOre(Block block, World world, Random random, int blockXPos, int blockZPos, int veinM, int veinX, int chancesToSpawn, int minY, int maxY )
    {
        for(int i = 0; i < chancesToSpawn; i++)
        {
            int posX = blockXPos + random.nextInt(16);
            int posY = minY + random.nextInt(maxY - minY);
            int posZ = blockZPos + random.nextInt(16);
            (new WorldGenMinable(block, (veinM + random.nextInt(veinX - veinM)))).generate(world, random, posX, posY, posZ);
        }
    }
}

Thank you so much. I was so stupid, and initialized the block wrong.