[MC-164499] Game crashes when creating customized superflat world with unparsable biome

The bug

When using a non-[a-z0-9/._-]-character as biome in a superflat preset, the game crashes.

How to reproduce

Open MC 1.14.4 or later
Create new superflat world
Choose a preset that uses a non-[a-z0-9/._-] character as biome (e.g. minecraft:air;*;)
Click Done (or whatever button it was)
→ ❌ The game crashes instead of giving a proper error message

Attachments

crash-2019-10-19_16.51.42-client.txt

crash-2019-10-19_16.53.12-client.txt

Comments 1

NeunEinser 2019-10-26T15:02:05Z

You used a comma (,) instead of a semicolon (;) after minecarft:dark_forest, so the game is trying to parse all of minecraft:dark_forest,stronghold,biome_1,mansion,dungeon as the biome.
Probably still a bug that the game crashes instead of giving a proper error message.