World crash

Put the summary of the bug you're having here

*What I expected to happen was...:

Trying to get a piston to update with a simple right click*

Describe what you thought should happen here:

Right click to update piston with the item frame

What actually happened was...:
Describe what happened here:

Minecraft when white then crashed (entity rendering problem)
(Dont test on any world of importance! It will corrupt the whole world!)

Steps to Reproduce:
1. Create a vertical bud switch (Not sure if this has a factor on it) Update:
Having the bud switch there had no factor on it.
2. Shift+right click on the piston with an item frame selected.
3. Crash the world/ game xD