Minecraft crashed after switching to the next villager trade

(NEW) YouTube-Video: http://youtu.be/APGEPLoh1p4

I clicked "next" in a villager trading window to get to the next trade (4th item or so)

What I expected to happen was...:
I get to see the next trade

What actually happened was...:
Minecraft immediately crashed.

Steps to Reproduce:
1. Open a villager trade
2. Switch through the offers a few times

Crash logs attached.