I made a new world and then it crashed

Put the summary of the bug you're having here

*What I expected to happen was...:It was not going to crash
Describe what you thought should happen here
It should let me type the world name and make the world

*What actually happened was...:*When I was typing the world name it crashed
Describe what happened here

Steps to Reproduce:
1. Go to the Derset and break the sand to the bottom of the world
2. ...then it falls down
3. ...exit make a new world and then it crashes