[MC-201473] Trying to create customized superflat world without biome gives an crash.

When trying to create customized superflat world with preset: minecraft:bedrock,2*minecraft:dirt,minecraft:grass_block;

gives an error: "The game crashed whilst mouseclicked event handler
Error: java.lang.IllegalStateException: Missing: ResourceKey[minecraft:worldgen/biome / minecraft:]"

Environment

Java: Version 8 Update 261 OS: Microsoft Windows 10 GPU: Nvidia Geforce GTX 770 CPU: 4x Intel Core i5-4670K 3.40 Ghz RAM: 8GB DDR3

Linked issues

duplicates 1

MC-198725 Crash when clicking "Presets" after setting the superflat preset with a non-existent biome Resolved

Attachments

crash-2020-10-03_21.09.56-client.txt

Comments 3

migrated 2020-10-03T23:26:56Z

Duplicates MC-198725 that was fixed in 20w46a.

migrated 2020-10-11T14:25:10Z

I think that in older versions it just reseted but now it crashes

migrated 2020-11-16T15:09:14Z

Fixed in 20w46a. When using this preset the game output outputs "Error while parsing flat world string => Invalid Biome: minecraft:".