Crash while attempting to trade with Villager

Put the summary of the bug you're having here

What I expected to happen was...:
complete trade with villager (butcher)

What actually happened was...:
Pgm flat out blew up

Steps to Reproduce:
1. Village of about 30ish villagers; 90% with multiple trades (up to 7 per?)
2. Initiate trade with butcher.. do several trades...
3. On one trade later, the error may occur. Sorry, this is intermittent.

I'm on a multiserver platform (ScoutCraft), but this has happened multiple times ⚠️ on my private world, too. Maybe 50 times there... back to version 1.6s or even older.

The deadfile is attached to the game I'm playng now... I'll go look for it...

IMPORTANT: Couldn't you guys automatically grab the thing for us?? Lots faster & more accurate, too, I'd think!

Nope, I cant find it.
Looked through anything on my computer dated today.
Nada.
Bummer. This problem REALLY needs to get solved.