So, I've been on Minecraft for about a month now. installing mods and what not, and I made glass out of sand but when I click on the glass I crash and get this error:
--- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!
java.lang.ArrayIndexOutOfBoundsException: -1
at net.minecraft.item.ItemStack.func_77980_a(ItemStack.java:411)
at net.minecraft.inventory.SlotFurnace.func_75208_c(SlotFurnace.java:58)
at net.minecraft.inventory.SlotFurnace.func_82870_a(SlotFurnace.java:44)
at net.minecraft.inventory.Container.func_75144_a(SourceFile:238)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78753_a(PlayerControllerMP.java:445)
at net.minecraft.client.gui.inventory.GuiContainer.func_146984_a(bdd.java:514)
at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(bdd.java:332)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:309)
at net.minecraft.client.gui.inventory.GuiContainer.func_146274_d(bdd.java:53)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:275)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1625)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:953)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:870)
at net.minecraft.client.main.Main.main(SourceFile:103)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
A detailed walkthrough of the error, its code path and all known details is as follows:
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-- Head --
Stacktrace:
at net.minecraft.item.ItemStack.func_77980_a(ItemStack.java:411)
at net.minecraft.inventory.SlotFurnace.func_75208_c(SlotFurnace.java:58)
at net.minecraft.inventory.SlotFurnace.func_82870_a(SlotFurnace.java:44)
at net.minecraft.inventory.Container.func_75144_a(SourceFile:238)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78753_a(PlayerControllerMP.java:445)
at net.minecraft.client.gui.inventory.GuiContainer.func_146984_a(bdd.java:514)
at net.minecraft.client.gui.inventory.GuiContainer.func_73864_a(bdd.java:332)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:309)
at net.minecraft.client.gui.inventory.GuiContainer.func_146274_d(bdd.java:53)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:275)
I know nothing about Minecraft crashes, so can someone please help me??