I encountered a crash when loading a world in Minecraft 1.21.11 Pre-Release 2. The crash occurs during chunk loading, specifically when the game tries to update chunks at positions [-12,14] and [-17,14]. The error is a ConcurrentModificationException in the LegacyStructureDataHandler.
Steps to Reproduce:
Have a world that was generated in 1.21.11-pre1 (the seed is 4256825463603229770).
Update to 1.21.11 Pre-Release 2.
Try to load the world.
The game crashes when loading the chunks at the mentioned coordinates.
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Comments 4
This version of my world was created a long time ago and has been gradually upgraded to the latest snapshot. However, I am unable to reproduce it. It might be that the world was damaged during the upgrade process.
I’m unable to replicate this crash. Please attach a video showcasing this being reproduced in a new world using that seed