Mystical Agriculture 1.6.9
Minecraft 1.12.2
Forge 2673

Description: Rendering screen

java.lang.NullPointerException: Rendering screen
at thaumcraft.api.crafting.ShapelessArcaneRecipe.func_77569_a(ShapelessArcaneRecipe.java:60)
at assets.recipehandler.CraftingHandler.getCrafts(CraftingHandler.java:175)
at assets.recipehandler.CraftingHandler.getNumberOfCraft(CraftingHandler.java:263)
at assets.recipehandler.GuiEventHandler$CreativeButton.func_191745_a(GuiEventHandler.java:130)
at net.minecraft.client.gui.GuiScreen.func_73863_a(GuiScreen.java:70)
at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:80)
at com.blakebr0.mysticalagriculture.gui.GuiTinkeringTable.func_73863_a(GuiTinkeringTable.java:25)
at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:368)
at sun.reflect.GeneratedMethodAccessor56.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at Reflector.callVoid(Reflector.java:636)
at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1457)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1117)
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(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)

A detailed walkthrough of the error, its code path and all known details is as follows:
-- Head --
Thread: Client thread
Stacktrace:
at thaumcraft.api.crafting.ShapelessArcaneRecipe.func_77569_a(ShapelessArcaneRecipe.java:60)
at assets.recipehandler.CraftingHandler.getCrafts(CraftingHandler.java:175)
at assets.recipehandler.CraftingHandler.getNumberOfCraft(CraftingHandler.java:263)
at assets.recipehandler.GuiEventHandler$CreativeButton.func_191745_a(GuiEventHandler.java:130)
at net.minecraft.client.gui.GuiScreen.func_73863_a(GuiScreen.java:70)
at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:80)
at com.blakebr0.mysticalagriculture.gui.GuiTinkeringTable.func_73863_a(GuiTinkeringTable.java:25)
at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:368)
at sun.reflect.GeneratedMethodAccessor56.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at Reflector.callVoid(Reflector.java:636)

-- Screen render details --
Details:
Screen name: com.blakebr0.mysticalagriculture.gui.GuiTinkeringTable
Mouse location: Scaled: (256, 139). Absolute: (1280, 693)
Screen size: Scaled: (512, 278). Absolute: (2560, 1387). Scale factor of 5

Crashed as soon as I tried to open that table. Not even sure why thaumcraft was involved.

Azanor commented 15 hours ago
I suspect the bug is on their side - they are passing a null itemstack which is a big nono. I will catch the error, but you should report it to that mods authors as well.

So here it is.

Can't reproduce