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via GitHub by scottosx
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java.lang.NullPointerException: Unexpected error	at net.minecraft.item.ItemStack.func_82833_r(ItemStack.java:500)	at WayofTime.bloodmagic.item.sigil.ItemSigilTransposition.func_77653_i(ItemSigilTransposition.java:62)	at net.minecraft.item.ItemStack.func_82833_r(ItemStack.java:500)	at net.minecraftforge.client.GuiIngameForge.renderToolHighlight(GuiIngameForge.java:614)	at net.minecraftforge.client.GuiIngameForge.func_175180_a(GuiIngameForge.java:151)	at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1368)	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1077)	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:369)	at net.minecraft.client.main.Main.main(SourceFile:124)	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:135)	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)