Summary of bug

What I was expecting to happen:
I was expecting to place an item frame on my wall and place a flower in it

What actually happened:
I place the item frame on some stained glass (After reproducing problem several times, it can be any block) and suddenly, my screen turned to the color of the sky, then the game closed.

Steps:
1. Get minecraft snapshot 14w18a
2. Open world and place item frame
3. Watch screen turn blue and game crash