java.util.concurrent.ExecutionException: java.lang.NullPointerException

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java.lang.NullPointerException
java.util.concurrent.ExecutionException: java.lang.NullPointerException
at com.zerofall.ezstorage.util.EZInventory.stacksEqualOreDict(EZInventory.java:223)
at com.zerofall.ezstorage.util.EZInventory.getItems(EZInventory.java:179)
at com.zerofall.ezstorage.gui.server.ContainerStorageCoreCrafting.tryToPopulateCraftingGrid(ContainerStorageCoreCrafting.java:140)
at com.zerofall.ezstorage.gui.server.ContainerStorageCoreCrafting.func_82846_b(ContainerStorageCoreCrafting.java:84)
at com.zerofall.ezstorage.gui.server.ContainerStorageCore.func_184996_a(ContainerStorageCore.java:93)
at com.zerofall.ezstorage.gui.server.ContainerStorageCoreCrafting.func_184996_a(ContainerStorageCoreCrafting.java:116)
at net.minecraft.network.NetHandlerPlayServer.func_147351_a(NetHandlerPlayServer.java:1112)
at net.minecraft.network.play.client.CPacketClickWindow.func_148833_a(SourceFile:33)
at net.minecraft.network.play.client.CPacketClickWindow.func_148833_a(SourceFile:10)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at net.minecraft.util.Util.func_181617_a(SourceFile:45)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Thread.java:745)

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