My minecraft game keeps crashing

Put the summary of the bug you're having here My game crashes and I cant get on to minecraft.

What I expected to happen was...: I dont expect anything
Describe what you thought should happen here you can maybe help me.

What actually happened was...: My game crashes repetedly
Describe what happened here

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