[MC-267229] Snow golems cannot spawn naturally using customized worldgen, and are replaced with pigs

If you create a custom biome or structure and make snow golems spawn in it using the spawners or spawn_overrides JSON objects, you will instead see pigs spawn. This has been in the game in previous updates too.

See the attached datapack, which modifies the snowy_taiga biome to only spawn snow golems as creatures.

Steps to reproduce:

Create a world with the following:
→ Single biome, snowy taiga
→ Use 'datapack.zip'

Run the following command when world loads:

/effect give @e[type=minecraft:snow_golem] minecraft:glowing

Attachments

bugpack.zip

test snow biome.zip

Comments 3

Wolphwood 2023-12-09T16:45:25Z

I can confirm this issue, i have similar behavior when i want to create a custom biome with a naturally spawned snow golem.
I wanted to add a snowy version of the mushroom biome, but i have pigs instead ^^"

Tested on Minecraft 1.20.1, fabric and vanilla.

[Mod] Jingy 2024-01-24T21:28:25Z

Can confirm in 24w04a. I've written a new title and description to better suit the issue.

Here are some steps to reproduce, and an updated title:
Title

Snow golems cannot spawn naturally using customized worldgen, and are replaced with pigs

Steps to reproduce:

Create a world with the following:
→ Single biome, snowy taiga
→ Use 'datapack.zip'

Run the following command when world loads:

/effect give @e[type=minecraft:snow_golem] minecraft:glowing

user-f2760 2024-01-24T22:27:25Z

Just FYI, it spawns a pig instead (asopposed to a zombie or alike) as that's the default entity type. The snow golem is essentially a blacklisted ID from natural spawning. Makes me wonder if other entities that don't spawn naturally are affected too...