Everytime I try to play the game, it crashes.

Put the summary of the bug you're having here

What I expected to happen was...:
I had just updated it to 1.6.2 and the game client was opening and I see the mojang logo.

What actually happened was...:
It crashes every time.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. Open launcher.
3. Hit Play.