My game crashed 2 times

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ... I was playing the version and mining...
3. ... When I was mining the game started to lag really bad.