When using a preset Superflat world and assigning a wrong biome name the game crashes
What I expected to happen was...:
I expected the preset to reset to a default form when you messes up the biome name
as when the block layers script is wrong
What actually happened was...:
The game crashes
Steps to Reproduce:
1. Create a new world
2. Superflat >> Costumize >> Presets
3. Change the biome to anything wrong;
4. Press "Use preset"
5. Press "Done"
6. The game crashes
(Crash report attached)