When ever i join minecraft with the new launcher is comes up with a crash report. (Dont worry i'm getting a better computer) lol :D

I was joining with the new launcher.

Well... Join...
Describe what you thought should happen here

What actually happened was...:I joined and just came up with a crash report (downloaded fine)
Describe what happened here

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