Put the summary of the bug you're having here
What I expected to happen was...:
Minecraft be able to start running
What actually happened was...:
The game crashed
Steps to Reproduce:
1. Create a skeleton, apply a potion effect on it, and open minecraft in 13w23a or any other snapshot.
Duplicate of MC-17222, please use the search function to see if your bug has already been submitted. Currently over 56% of tickets are being closed as duplicate.