What I expected was...:
When I was flying around and some chunks are still not spawning... they will spawn automatically when I get there

What actually happened was...:
When I get to the chunk that was not still spawning and get away to the spawned chunks... the screen become black

Steps to reproduce:
1. Find an chunk that is still not spawned
2. Go there (when flying)
3. When you get there and its daytime it will became dark
4. Save and Quit to title
5. Get back to the world you play when there is a chunk that is not spawned
6. Minecraft Crashes