Minecraft version & Mod Version: 1.12.2

Single player or Server: Singleplayer

Describe problem (what you were doing / what happened):
was testing the mod and when i shoft clicked an item into the main terminal just the terminal that shows the blocks it crashed the game

Crash log (if any):
It didn't save the latest log since it crashed bc the game didn't respond

even when the game doesnt respond there is usually something either in logs or crash reports after the game finishes exiting.

I have been shift clicking items into it for months with no issues. but by all means if it happens again please open a new issue