Put the summary of the bug you're having here

I was playing on the snapshot and suddenly I became unable to place wood logs on the floor, crashing my game everytime, I don't know if it reacts the same way to any other blocks or any other snapshot
Describe what you thought should happen here
It should place the block without crashing me... .

What actually happened was...:
It crashed my game wtf
Steps to Reproduce:
1. place a block on the floor
2. I crash,,,

Screenshots of the crash reports from when I tried placing logs on a superflat world:
http://c.oppy.me/mXckyNcb.png
http://c.oppy.me/h4MJfKuR.png