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java.lang.NullPointerException: 	at net.minecraft.item.ItemStack.func_77952_i(ItemStack.java:244)	at ic2.api.recipe.RecipeInputOreDict.matches(RecipeInputOreDict.java:32)	at ic2.core.recipe.AdvShapelessRecipe.func_77572_b(AdvShapelessRecipe.java:171)	at ic2.core.recipe.AdvShapelessRecipe.func_77569_a(AdvShapelessRecipe.java:153)	at gregtech.api.util.GT_ModHandler.removeRecipe(GT_ModHandler.java:1171)