The bug
Using /locate
on a non-existent or very far away structure freezes the game. The game, however, unfreezes when a structure is found. It's best to reproduce in customized worlds with many biomes scattered in small patches.
How to reproduce
Download the Forest Biomes worldgen
Import it to a new MC world
Open it to LAN
Use /locate mansion
→ ❌ Game freezes
Linked issues
duplicates 1
Attachments
Comments 7


Can reproduce in this specific circumstance with custom worlds, but not with similar cases (e.g. finding a mansion in a superflat world, or a nether fortress in a normal overworld).
Minecraft crashes when I import the file.
Here's a new one. It works, however, the game now unfreezes when the structure is found.
I'd highly suggest actually merging this report with the much more up-to-date non-customized-exclusive version MC-250276. It's the same issue, but this report makes it seem like it's unique to customized worlds, while it is absolutely not.

I agree, there's no sense in having two open tickets for the same issue.
The client itself continues to run so far for me, but the server freezes instantly.