Going into a single-player world in 1.10.1 and it crashing, but other worlds not crashing.

Put the summary of the bug you're having here

What I expected to happen was...:
I went to a Minecraft world that I go onto often, its a bit laggy but I still like that world. Normally, in 1.10.0 I could stay as long as I want with out crashing. Thus it would be my normal world.

What actually happened was...:
I was able to be on for 1-3 minutes, then it would give me the crash report. I've tried three times now. I have also joined my other worlds and they have not crashed.

Steps to Reproduce:
1. Open Minecraft in 1.10.1
2. Click on the first world
3. Be on it for 1-3 minutes
4. Crash Report shows.