Minecraft crashes

Put the summary of the bug you're having here

*What I expected to happen was...:*To open a minecraft world
Describe what you thought should happen here
A minecraft world should open
*What actually happened was...:*Minecraft crashed
Describe what happened here i went to create a new world and minecraft crashed

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...i have no idea it just started happening to my game
3. ...