1. What did you expect to happen?
   a) not to crash
   b) In tfc builds previous to 1.12.2 you are able to cool off ingots(and casts of ingots) much faster by putting them into a barrel with water in it(consuming some of the water to cool the heat)

2. What actually happened instead (i.e. what was the bug)
   a crash occurs

3. If it was a crash, upload the full log file (latest.log)
   pastebin: https://pastebin.com/kiSe2FBa

EDIT: Woops found "latest log": https://pastebin.com/kB4mVVR4

To Reproduce
fill up a barrel and unseal it
heat up an ingot (Only tested with copper ingot so far)
could use pit kiln to melt ore into ingot
could use /heat
place ingot into the middle slot(the "storage" slot that doesn't fill or empty the barrel)

Meta Info

• TFC Version: 0.X.X.XX
  TerraFirmaCraft-MC1.12.2-0.23.8.75 (copied the file name)

• Were any other mods included?
  No mods were included