Minecraft v1.12.2
Forge v14.23.5.2838
NoMoreRecipeConflict v0.13
Better Chesting v1.1.1
Placebo v1.6.0

I got this crash after trying to combine a chest with items in it (made possible with Better Chesting) with a minecart in the crafting screen of my player. Vanilla Fix also mentioned that the No More Recipe Conflict Mod was involved.

Crash Report

Steps to Reproduce:

1. I had placed the chest in the crafting area first and
2. Then the output displayed the Tiny Chest from Extra Utilities
3. Then it crashed when I placed the minecart in the crafting area.

Ok, thanks. I suspect it's Metal Transport then.

This issue isn't actually caused by placebo but I show up in the stacktrace due to my replacement of shapeless recipes. This is caused by some mod's recipe having a broken Ingredient object.