pouch

java.lang.ArrayIndexOutOfBoundsException: -999
	at java.util.ArrayList.elementData(ArrayList.java:418)
	at java.util.ArrayList.get(ArrayList.java:431)
	at net.minecraft.inventory.Container.func_75139_a(Container.java:120)
	at com.kashdeya.tinyprogressions.container.PouchContainer.func_184996_a(PouchContainer.java:45)
	at net.minecraft.client.multiplayer.PlayerControllerMP.func_187098_a(PlayerControllerMP.java:566)
	at net.minecraft.client.gui.inventory.GuiContainer.func_184098_a(GuiContainer.java:638)
	at net.minecraft.client.gui.inventory.GuiContainer.func_146286_b(GuiContainer.java:580)
	at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:543)
	at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:501)
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1757)
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1096)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:397)
	at net.minecraft.client.main.Main.main(SourceFile:123)
	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:498)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	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:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
	at java.util.ArrayList.elementData(ArrayList.java:418)
	at java.util.ArrayList.get(ArrayList.java:431)
	at net.minecraft.inventory.Container.func_75139_a(Container.java:120)
	at com.kashdeya.tinyprogressions.container.PouchContainer.func_184996_a(PouchContainer.java:45)
	at net.minecraft.client.multiplayer.PlayerControllerMP.func_187098_a(PlayerControllerMP.java:566)
	at net.minecraft.client.gui.inventory.GuiContainer.func_184098_a(GuiContainer.java:638)
	at net.minecraft.client.gui.inventory.GuiContainer.func_146286_b(GuiContainer.java:580)
	at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:543)
	at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:501)

-- Affected screen --
Details:
	Screen name: com.kashdeya.tinyprogressions.gui.PouchGui