gistfile1.txt

java.util.ConcurrentModificationException
    at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445)
    at java.util.HashMap$ValueIterator.next(HashMap.java:1474)
    at net.minecraft.world.World.addTileEntities(World.java:1946)
    at net.minecraft.world.chunk.Chunk.onLoad(Chunk.java:856)
    at net.minecraftforge.common.chunkio.ChunkIOProvider.syncCallback(ChunkIOProvider.java:109)
    at net.minecraftforge.common.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:94)
    at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:118)
    at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:89)
    at net.minecraft.world.gen.ChunkProviderServer.provideChunk(ChunkProviderServer.java:135)
    at net.minecraft.world.World.getChunk(World.java:310)
    at net.minecraft.world.ChunkCache.<init>(ChunkCache.java:37)
    at net.minecraft.pathfinding.PathNavigate.getPathToPos(SourceFile:113)
    at net.minecraft.pathfinding.PathNavigateGround.getPathToPos(SourceFile:65)
    at net.minecraft.pathfinding.PathNavigate.getPathToXYZ(SourceFile:93)
    at net.minecraft.pathfinding.PathNavigate.tryMoveToXYZ(SourceFile:143)
    at net.minecraft.entity.ai.EntityAIWander.startExecuting(SourceFile:65)
    at net.minecraft.entity.ai.EntityAITasks.onUpdateTasks(SourceFile:102)
    at net.minecraft.entity.EntityLiving.updateEntityActionState(EntityLiving.java:763)
    at net.minecraft.entity.EntityLivingBase.onLivingUpdate(EntityLivingBase.java:2359)
    at net.minecraft.entity.EntityLiving.onLivingUpdate(EntityLiving.java:577)
    at net.minecraft.entity.monster.EntityMob.onLivingUpdate(EntityMob.java:45)
    at techguns.entities.npcs.GenericNPCUndead.onLivingUpdate(GenericNPCUndead.java:44)
    at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2179)
    at net.minecraft.entity.EntityLiving.onUpdate(EntityLiving.java:295)
    at net.minecraft.entity.monster.EntityMob.onUpdate(EntityMob.java:50)
    at techguns.entities.npcs.GenericNPC.onUpdate(GenericNPC.java:371)
    at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:1993)
    at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:832)
    at net.minecraft.world.World.updateEntity(World.java:1955)
    at net.minecraft.world.World.redirect$updateEntity$zbc000(World.java:4118)
    at net.minecraft.world.World.updateEntities(World.java:1759)
    at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:613)
    at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:767)
    at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:668)
    at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:185)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
    at java.lang.Thread.run(Thread.java:748)