Crashes as soon as I press play, version 1.6 launcher.

Put the summary of the bug you're having here

What I expected to happen was...:
Log in and play minecraft.
Describe what you thought should happen here

What actually happened was...:
Game crashes with out trying to start.
Describe what happened here

Steps to Reproduce:
1.Start launcher
2.Try to log in
3.Press play.