at net.minecraft.item.ItemStack.func_77960_j(ItemStack.java:217)
at WayofTime.alchemicalWizardry.common.compress.StorageBlockCraftingRecipeAssimilator.areInputsIdentical(StorageBlockCraftingRecipeAssimilator.java:225)
at WayofTime.alchemicalWizardry.common.compress.StorageBlockCraftingRecipeAssimilator.getIdenticalInputs(StorageBlockCraftingRecipeAssimilator.java:205)
at WayofTime.alchemicalWizardry.common.compress.StorageBlockCraftingRecipeAssimilator.getPackingRecipe(StorageBlockCraftingRecipeAssimilator.java:164)
at WayofTime.alchemicalWizardry.common.compress.StorageBlockCraftingRecipeAssimilator.getPackingRecipes(StorageBlockCraftingRecipeAssimilator.java:35)
at WayofTime.alchemicalWizardry.common.compress.StorageBlockCraftingManager.addStorageBlockRecipes(StorageBlockCraftingManager.java:27)
at WayofTime.alchemicalWizardry.AlchemicalWizardry.initCompressionHandlers(AlchemicalWizardry.java:1645)
at WayofTime.alchemicalWizardry.AlchemicalWizardry.postInit(AlchemicalWizardry.java:1266)
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:483)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:532)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:212)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
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:483)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:119)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:742)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:311)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:552)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878)
at net.minecraft.client.main.Main.main(SourceFile:148)
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:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

Maybe try providing the full log on Pastebin.

https://gist.github.com/DPxKnightxZero/78efdb49eab230c9706f

I've heard Forestry 4 is doing retarded stuff with their recipes, same with Dragon API. I have a handler that goes through recipes, and if they do stuff like null outputs or null Items, the thing will fail on my handler.

I think it may have been divine rpg and forestry XD

Honestly you might want to talk to the forestry team because they massively updated their API.

Or you could just downgrade to a stable version of Forestry.

Way to ignore the issue XD

Except it's not an issue? Forestry 4 is not compatible with anything that supports Forestry 3. It's also an issue on their end.

xxXXXXXdDDDDDDddddDDD