I am most likely doing something wrong here, as I am trying to follow 2 tutorials at once on this, but I'm not sure.

 

I made a tile entity with an inventory and a Gui and when I tested it by placing the block in the world and clicking it, Minecraft froze up, turned unresponsive, but didn't crash completely although it said as much in the logs.

 

Oddly enough, there is a crash report and it told me there was a nullpointer exception, but the stack trace doesn't seem to point to any of my classes.

 

Here is some information:

[spoiler=Crash Report]

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 1/28/17 2:55 PM
Description: Ticking player

java.lang.NullPointerException: Ticking player
at net.minecraft.item.ItemStack.areItemStacksEqual(ItemStack.java:442)
at net.minecraft.inventory.Container.detectAndSendChanges(Container.java:89)
at net.minecraft.entity.player.EntityPlayerMP.onUpdate(EntityPlayerMP.java:292)
at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2138)
at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:879)
at net.minecraft.world.World.updateEntity(World.java:2105)
at net.minecraft.world.WorldServer.tickPlayers(WorldServer.java:676)
at net.minecraft.world.World.updateEntities(World.java:1894)
at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:647)
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:794)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:698)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:156)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:547)
at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Stacktrace:
at net.minecraft.item.ItemStack.areItemStacksEqual(ItemStack.java:442)
at net.minecraft.inventory.Container.detectAndSendChanges(Container.java:89)
at net.minecraft.entity.player.EntityPlayerMP.onUpdate(EntityPlayerMP.java:292)
at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2138)
at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:879)
at net.minecraft.world.World.updateEntity(World.java:2105)

-- Player being ticked --
Details:
Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)
Entity ID: 240
Entity Name: Awesome_Spider
Entity's Exact location: 65.19, 63.00, -52.49
Entity's Block location: World: (65,63,-53), Chunk: (at 1,3,11 in 4,-4; contains blocks 64,0,-64 to 79,255,-49), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Entity's Momentum: 0.00, -0.08, 0.00
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.world.WorldServer.tickPlayers(WorldServer.java:676)
at net.minecraft.world.World.updateEntities(World.java:1894)
at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:647)

-- Affected level --
Details:
Level name: test world
All players: 1 total; [EntityPlayerMP['Awesome_Spider'/240, l='test world', x=65.19, y=63.00, z=-52.49]]
Chunk stats: ServerChunkCache: 625 Drop: 0
Level seed: 4328687399279554201
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options: 
Level spawn location: World: (72,64,-36), Chunk: (at 8,4,12 in 4,-3; contains blocks 64,0,-48 to 79,255,-33), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 19166 game time, 7208 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 108385 (now: false), thunder time: 1406 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:794)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:698)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:156)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:547)
at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
Minecraft Version: 1.11
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_60, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 461760664 bytes (440 MB) / 935329792 bytes (892 MB) up to 1415053312 bytes (1349 MB)
JVM Flags: 0 total; 
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP 9.35 Powered by Forge 13.19.1.2189 4 mods loaded, 4 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA	mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
UCHIJAAAA	FML{8.0.99.99} [Forge Mod Loader] (forgeSrc-1.11-13.19.1.2189.jar) 
UCHIJAAAA	forge{13.19.1.2189} [Minecraft Forge] (forgeSrc-1.11-13.19.1.2189.jar) 
UCHIJAAAA	roboticraft{1.11R1.0.0} [RobotiCraft] (1.11) 
Loaded coremods (and transformers): 
GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [EntityPlayerMP['Awesome_Spider'/240, l='test world', x=65.19, y=63.00, z=-52.49]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

 

 

[spoiler=Code]

Main class:

public class RobotiCraft
{
    public static final String ModId = "roboticraft";
    public static final String Name = "RobotiCraft";
    public static final String Version = "1.11R1.0.0";

    public static Logger log = LogManager.getLogger(ModId);

    @Mod.Instance
    public static RobotiCraft instance = new RobotiCraft();

    @SidedProxy(clientSide="wiseowl5.roboticraft.Proxies.ClientProxy", serverSide="wiseowl5.roboticraft.Proxies.CommonProxy")
    public static CommonProxy proxy;

    public static CreativeTabs creativeTab = new ModCreativeTab();

    @EventHandler
    public void preInit(FMLPreInitializationEvent e) {
        ModItems.initItems();
        ModBlocks.initBlocks();

        GameRegistry.registerWorldGenerator(new ModWorldGen(), 3);
    }

    @EventHandler
    public void init(FMLInitializationEvent e) {
        ModRecipes.initRecipes();

        proxy.registerGuiHandler();
    }

    @EventHandler
    public void postInit(FMLPostInitializationEvent e) {

    }
}

 

The block class:

public class BlockSteamEngine extends BlockTileEntity<TileEntitySteamEngine> {

    public BlockSteamEngine() {
        super(Material.ROCK, "steam_engine");
    }

    @Override
    public Class<TileEntitySteamEngine> getTileEntityClass() {
        return TileEntitySteamEngine.class;
    }

    @Nullable
    @Override
    public TileEntitySteamEngine createTileEntity(World world, IBlockState state) {
        return new TileEntitySteamEngine();
    }

    @Override
    public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing side, float hitX, float hitY, float hitZ) {
        if (!world.isRemote) {
            player.openGui(RobotiCraft.instance, ModGuiHandler.TILE_ENTITY_STEAM_ENGINE_GUI, world, pos.getX(), pos.getY(), pos.getZ());
        }

        return true;
    }
}

 

The tile entity class (partially based off the furnace):

public class TileEntitySteamEngine extends TileEntity implements ITickable, IInventory, IEnergyProvider {

    private ItemStackHandler inventory;
    private String customName;

    private int burnTime;
    private int totalBurnTime;

    private int maxEnergy;
    private int storedEnergy;

    public TileEntitySteamEngine() {
        inventory = new ItemStackHandler(1);
    }

    public int getSizeInventory() {
        return 1;
    }

    public int getBurnTime() {
        return burnTime;
    }

    public int getTotalBurnTime() {
        return totalBurnTime;
    }

    public boolean isBurning() {
        return burnTime > 0;
    }

    //ITickable

    @Override
    public void update() {

    }

    //IPowerProvider

    @Override
    public int extractEnergy(EnumFacing from, int maxExtract, boolean simulate) {
        return 0;
    }

    @Override
    public int getEnergyStored(EnumFacing from) {
        return storedEnergy;
    }

    @Override
    public int getMaxEnergyStored(EnumFacing from) {
        return maxEnergy;
    }

    @Override
    public boolean canConnectEnergy(EnumFacing from) {
        return false;
    }

    //IInventory

    @Override
    public boolean isEmpty() {
        return inventory.getStackInSlot(inventory.getSlots()).isEmpty();
    }

    @Override
    public String getName() {
        return this.hasCustomName() ? this.customName : "container.tile_entity_steam_engine";
    }

    public String getCustomName() {
        return this.customName;
    }

    public void setCustomName(String customName) {
        this.customName = customName;
    }

    @Override
    public boolean hasCustomName() {
        return this.customName != null && !this.customName.equals("");
    }

    @Override
    public ItemStack getStackInSlot(int index) {
        if (index < 0 || index >= this.getSizeInventory())
            return null;
        return this.inventory.getStackInSlot(index);
    }

    @Override
    public ItemStack decrStackSize(int index, int count) {
        if (this.getStackInSlot(index) != null) {
            ItemStack itemstack;

            if (this.getStackInSlot(index).getCount() <= count) {
                itemstack = this.getStackInSlot(index);
                this.setInventorySlotContents(index, null);
                this.markDirty();
                return itemstack;
            } else {
                itemstack = this.getStackInSlot(index).splitStack(count);

                if (this.getStackInSlot(index).getCount() <= 0) {
                    this.setInventorySlotContents(index, null);
                } else {
                    //Just to show that changes happened
                    this.setInventorySlotContents(index, this.getStackInSlot(index));
                }

                this.markDirty();
                return itemstack;
            }
        } else {
            return null;
        }
    }

    @Override
    public ItemStack removeStackFromSlot(int index) {
        return null;
    }

    @Override
    public void setInventorySlotContents(int index, ItemStack stack) {
        if (index < 0 || index >= this.getSizeInventory())
            return;

        if (stack != null && stack.getCount() > this.getInventoryStackLimit())
            stack.setCount(this.getInventoryStackLimit());

        if (stack != null && stack.getCount() == 0)
            stack = null;

        this.inventory.setStackInSlot(index, stack);
        this.markDirty();
    }

    @Override
    public int getInventoryStackLimit() {
        return 64;
    }

    @Override
    public boolean isUsableByPlayer(EntityPlayer player) {
        return this.world.getTileEntity(this.getPos()) == this && player.getDistanceSq(this.pos.add(0.5, 0.5, 0.5)) <= 64;
    }

    @Override
    public void openInventory(EntityPlayer player) {
    }

    @Override
    public void closeInventory(EntityPlayer player) {
    }

    @Override
    public boolean isItemValidForSlot(int index, ItemStack stack) {
        return true;
    }

    @Override
    public int getField(int id) {
        return 0;
    }

    @Override
    public void setField(int id, int value) {
    }

    @Override
    public int getFieldCount() {
        return 0;
    }

    @Override
    public void clear() {
        for (int i = 0; i < this.getSizeInventory(); i++)
            this.setInventorySlotContents(i, null);
    }

    //NBT/Capability

    @Override
    public NBTTagCompound writeToNBT(NBTTagCompound compound) {
        compound.setTag("inventory", inventory.serializeNBT());
        return super.writeToNBT(compound);
    }

    @Override
    public void readFromNBT(NBTTagCompound compound) {
        inventory.deserializeNBT(compound.getCompoundTag("inventory"));
        super.readFromNBT(compound);
    }

    @Override
    public boolean hasCapability(Capability<?> capability, @Nullable EnumFacing facing) {
        return capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY || super.hasCapability(capability, facing);
    }

    @Nullable
    @Override
    public <T> T getCapability(Capability<T> capability, @Nullable EnumFacing facing) {
        return capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY ? (T)inventory : super.getCapability(capability, facing);
    }
}

 

The Gui handler:

public class ModGuiHandler implements IGuiHandler {

    public static final int TILE_ENTITY_STEAM_ENGINE_GUI = 0;

    @Override
    public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
        if (ID == TILE_ENTITY_STEAM_ENGINE_GUI)
            return new ContainerTileEntitySteamEngine(player.inventory, (TileEntitySteamEngine) world.getTileEntity(new BlockPos(x, y, z)));

        return null;
    }

    @Override
    public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
        if (ID == TILE_ENTITY_STEAM_ENGINE_GUI)
            return new GuiSteamEngine(player.inventory, (TileEntitySteamEngine) world.getTileEntity(new BlockPos(x, y, z)));

        return null;
    }
}

 

The gui for my tile entity:

public class GuiSteamEngine extends GuiContainer {

    private IInventory playerInv;
    private TileEntitySteamEngine te;

    public GuiSteamEngine(IInventory playerInv, TileEntitySteamEngine te) {
        super(new ContainerTileEntitySteamEngine(playerInv, te));

        this.playerInv = playerInv;
        this.te = te;

        this.xSize = 176;
        this.ySize = 166;
    }

    @Override
    protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY) {
        GlStateManager.color(1.0f, 1.0f, 1.0f, 1.0f);
        this.mc.getTextureManager().bindTexture(new ResourceLocation("roboticraft:textures/gui/container/steam_engine_tile_entity.png"));
        this.drawTexturedModalRect(this.guiLeft, this.guiTop, 0, 0, this.xSize, this.ySize);

        if (te.isBurning())
        {
            int scaledBurnTime = this.getBurnLeftScaled(13);
            this.drawTexturedModalRect(80, 59 - scaledBurnTime, 176, 12 - scaledBurnTime, 14, scaledBurnTime + 1);
        }

        int scaledPower = this.getPowerScaled(30);
        this.drawTexturedModalRect(83, 5 - scaledPower, 176, 30 - scaledPower, 10, scaledPower + 1);
    }

    @Override
    protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY) {
        String s = this.te.getDisplayName().getUnformattedText();
        this.fontRenderer.drawString(s, 88 - this.fontRenderer.getStringWidth(s) / 2, 6, 4210752);            //#404040
        this.fontRenderer.drawString(this.playerInv.getDisplayName().getUnformattedText(), 8, 72, 4210752);      //#404040
    }

    private int getBurnLeftScaled(int pixels) {
        int totalBurnTime = this.te.getTotalBurnTime();

        return this.te.getBurnTime() * pixels / totalBurnTime;
    }

    private int getPowerScaled(int pixels) {
        int powerCapacity = this.te.getMaxEnergyStored(EnumFacing.NORTH);

        return this.te.getEnergyStored(EnumFacing.NORTH) * pixels / powerCapacity;
    }
}

 

The container:

public class ContainerTileEntitySteamEngine extends Container {
    private TileEntitySteamEngine te;

    public ContainerTileEntitySteamEngine(IInventory playerInv, TileEntitySteamEngine te) {
        this.te = te;

        // Tile Entity, Slot 1, Slot ID 1
        this.addSlotToContainer(new Slot(te, 0, 79, 39));

        // Player Inventory, Slot 9-35, Slot IDs 9-35
        for (int y = 0; y < 3; ++y) {
            for (int x = 0; x < 9; ++x) {
                this.addSlotToContainer(new Slot(playerInv, x + y * 9 + 9, 8 + x * 18, 84 + y * 18));
            }
        }

        // Player Inventory, Slot 0-8, Slot IDs 36-44
        for (int x = 0; x < 9; ++x) {
            this.addSlotToContainer(new Slot(playerInv, x, 8 + x * 18, 142));
        }
    }

    @Override
    public boolean canInteractWith(EntityPlayer playerIn) {
        return this.te.isUsableByPlayer(playerIn);
    }
}

 

 

If there is anything else you need please let me know.

 

Edit: I tried running it again and it did crash this time. Here is the new log:

[spoiler=New crash report]

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 1/28/17 3:27 PM
Description: Rendering screen

java.lang.NullPointerException: Rendering screen
at wiseowl5.roboticraft.Inventory.GuiSteamEngine.drawGuiContainerForegroundLayer(GuiSteamEngine.java:47)
at net.minecraft.client.gui.inventory.GuiContainer.drawScreen(GuiContainer.java:136)
at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:382)
at net.minecraft.client.renderer.EntityRenderer.updateCameraAndRender(EntityRenderer.java:1164)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1146)
at net.minecraft.client.Minecraft.run(Minecraft.java:405)
at net.minecraft.client.main.Main.main(Main.java:118)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
at GradleStart.main(GradleStart.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
at wiseowl5.roboticraft.Inventory.GuiSteamEngine.drawGuiContainerForegroundLayer(GuiSteamEngine.java:47)
at net.minecraft.client.gui.inventory.GuiContainer.drawScreen(GuiContainer.java:136)
at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:382)

-- Screen render details --
Details:
Screen name: wiseowl5.roboticraft.Inventory.GuiSteamEngine
Mouse location: Scaled: (160, 120). Absolute: (640, 480)
Screen size: Scaled: (320, 241). Absolute: (1280, 961). Scale factor of 4

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityPlayerSP['Awesome_Spider'/241, l='MpServer', x=65.19, y=63.00, z=-52.49]]
Chunk stats: MultiplayerChunkCache: 537, 537
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options: 
Level spawn location: World: (72,64,-36), Chunk: (at 8,4,12 in 4,-3; contains blocks 64,0,-48 to 79,255,-33), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 19423 game time, 7465 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 64 total; [EntityPig['Pig'/129, l='MpServer', x=125.78, y=67.00, z=-67.49], EntityPig['Pig'/130, l='MpServer', x=113.28, y=68.00, z=-52.23], EntityBat['Bat'/131, l='MpServer', x=119.23, y=54.70, z=-33.47], EntityPig['Pig'/132, l='MpServer', x=125.30, y=67.00, z=-43.53], EntityEnderman['Enderman'/133, l='MpServer', x=116.53, y=22.00, z=-5.47], EntitySquid['Squid'/135, l='MpServer', x=120.89, y=51.52, z=4.49], EntityCreeper['Creeper'/145, l='MpServer', x=135.50, y=41.00, z=-112.50], EntitySheep['Sheep'/146, l='MpServer', x=138.73, y=66.00, z=-118.53], EntityCreeper['Creeper'/147, l='MpServer', x=134.15, y=28.00, z=-109.47], EntitySheep['Sheep'/148, l='MpServer', x=136.76, y=69.00, z=-107.50], EntitySkeleton['Skeleton'/149, l='MpServer', x=129.50, y=32.00, z=-82.50], EntityEnderman['Enderman'/150, l='MpServer', x=134.50, y=36.00, z=-66.50], EntitySheep['Sheep'/151, l='MpServer', x=133.75, y=63.00, z=-64.49], EntitySkeleton['Skeleton'/152, l='MpServer', x=135.50, y=30.00, z=-60.50], EntityCreeper['Creeper'/153, l='MpServer', x=130.50, y=34.00, z=-57.50], EntityCreeper['Creeper'/154, l='MpServer', x=143.50, y=20.00, z=-35.83], EntitySkeleton['Skeleton'/155, l='MpServer', x=139.50, y=14.00, z=-24.50], EntityZombie['Zombie'/156, l='MpServer', x=130.09, y=28.00, z=-19.47], EntityZombie['Zombie'/157, l='MpServer', x=129.18, y=29.00, z=-23.54], EntityCreeper['Creeper'/158, l='MpServer', x=136.50, y=25.00, z=-22.50], EntityZombie['Zombie'/159, l='MpServer', x=128.50, y=30.00, z=-24.50], EntityCreeper['Creeper'/160, l='MpServer', x=140.69, y=19.00, z=-31.15], EntityBat['Bat'/161, l='MpServer', x=141.80, y=36.29, z=-31.35], EntityCreeper['Creeper'/162, l='MpServer', x=130.20, y=28.00, z=-6.44], EntityZombie['Zombie'/163, l='MpServer', x=132.45, y=26.14, z=-13.82], EntitySheep['Sheep'/39, l='MpServer', x=-7.19, y=79.00, z=-120.50], EntityZombie['Zombie'/40, l='MpServer', x=-8.51, y=31.00, z=-60.20], EntitySheep['Sheep'/168, l='MpServer', x=144.81, y=62.58, z=-54.19], EntitySheep['Sheep'/47, l='MpServer', x=0.74, y=78.00, z=-125.86], EntitySpider['Spider'/48, l='MpServer', x=1.25, y=40.00, z=-97.59], EntityCreeper['Creeper'/49, l='MpServer', x=1.50, y=39.00, z=-92.12], EntityZombie['Zombie'/50, l='MpServer', x=14.33, y=14.00, z=-49.69], EntitySpider['Spider'/52, l='MpServer', x=20.50, y=26.00, z=-122.50], EntitySkeleton['Skeleton'/53, l='MpServer', x=25.21, y=15.00, z=-100.63], EntitySpider['Spider'/54, l='MpServer', x=21.50, y=17.00, z=-93.50], EntityZombie['Zombie'/55, l='MpServer', x=20.07, y=13.00, z=-55.12], EntityZombie['Zombie'/56, l='MpServer', x=22.69, y=12.00, z=-51.22], EntityZombie['Zombie'/57, l='MpServer', x=20.70, y=13.00, z=-55.70], EntitySquid['Squid'/59, l='MpServer', x=22.76, y=62.02, z=11.47], EntityBat['Bat'/71, l='MpServer', x=49.25, y=52.10, z=-120.25], EntitySheep['Sheep'/72, l='MpServer', x=54.53, y=65.00, z=-56.27], EntitySheep['Sheep'/73, l='MpServer', x=49.50, y=67.00, z=-46.19], EntitySheep['Sheep'/83, l='MpServer', x=70.18, y=70.00, z=-34.46], EntityBat['Bat'/84, l='MpServer', x=76.48, y=36.81, z=-21.56], EntityCreeper['Creeper'/96, l='MpServer', x=88.30, y=46.00, z=-124.30], EntitySpider['Spider'/97, l='MpServer', x=89.52, y=46.00, z=-125.52], EntitySkeleton['Skeleton'/98, l='MpServer', x=84.53, y=46.00, z=-126.73], EntitySkeleton['Skeleton'/99, l='MpServer', x=83.50, y=46.00, z=-127.50], EntityZombie['Zombie'/100, l='MpServer', x=95.54, y=37.00, z=-31.77], EntitySheep['Sheep'/101, l='MpServer', x=87.47, y=65.00, z=-22.27], EntitySkeleton['Skeleton'/102, l='MpServer', x=95.47, y=22.00, z=22.22], EntityBat['Bat'/108, l='MpServer', x=108.34, y=14.10, z=-66.42], EntityBat['Bat'/109, l='MpServer', x=100.58, y=48.10, z=-73.75], EntityPig['Pig'/110, l='MpServer', x=111.75, y=65.00, z=-56.50], EntityCreeper['Creeper'/111, l='MpServer', x=101.25, y=40.00, z=-40.94], EntityBat['Bat'/112, l='MpServer', x=90.09, y=38.03, z=-26.56], EntityBat['Bat'/113, l='MpServer', x=93.68, y=37.63, z=-27.81], EntitySkeleton['Skeleton'/114, l='MpServer', x=108.70, y=52.00, z=-19.30], EntityBat['Bat'/115, l='MpServer', x=110.14, y=52.08, z=-20.37], EntitySheep['Sheep'/116, l='MpServer', x=99.77, y=69.00, z=-28.52], EntitySheep['Sheep'/117, l='MpServer', x=102.26, y=70.00, z=-31.48], EntityBat['Bat'/118, l='MpServer', x=108.29, y=34.96, z=4.35], EntityPlayerSP['Awesome_Spider'/241, l='MpServer', x=65.19, y=63.00, z=-52.49], EntitySkeleton['Skeleton'/120, l='MpServer', x=97.47, y=23.00, z=18.73]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.addWorldInfoToCrashReport(WorldClient.java:451)
at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:2780)
at net.minecraft.client.Minecraft.run(Minecraft.java:426)
at net.minecraft.client.main.Main.main(Main.java:118)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
at GradleStart.main(GradleStart.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

-- System Details --
Details:
Minecraft Version: 1.11
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_60, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 343920872 bytes (327 MB) / 811073536 bytes (773 MB) up to 1415053312 bytes (1349 MB)
JVM Flags: 0 total; 
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP 9.35 Powered by Forge 13.19.1.2189 4 mods loaded, 4 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA	mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
UCHIJAAAA	FML{8.0.99.99} [Forge Mod Loader] (forgeSrc-1.11-13.19.1.2189.jar) 
UCHIJAAAA	forge{13.19.1.2189} [Minecraft Forge] (forgeSrc-1.11-13.19.1.2189.jar) 
UCHIJAAAA	roboticraft{1.11R1.0.0} [RobotiCraft] (1.11) 
Loaded coremods (and transformers): 
GL info: ' Vendor: 'ATI Technologies Inc.' Version: '4.5.13399 Compatibility Profile Context 15.201.1151.1008' Renderer: 'AMD Radeon HD 5450'
Launched Version: 1.11
LWJGL: 2.9.4
OpenGL: AMD Radeon HD 5450 GL version 4.5.13399 Compatibility Profile Context 15.201.1151.1008, ATI Technologies Inc.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: 
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz

 

Ok, thanks. I changed them all to ItemStack.EMPTY and it works fine now. The item even stays in when I log out. I recall having trouble with that before...