[1.20.1] Chunk generation crash upon entering rift

[Not-February]

I'm still experiencing #12 with Multiverse 3.0.3.

It doesn't always happen, but more often than not I can replicate it by just making new worlds and generating new rifts with the kaleidite cores. Sooner or later, the deadlock will happen.

I, too, am running a rather large modpack with a lot of customizations - which unfortunately makes it a lot harder to isolate whether it's a mod conflict or not. Please let me know if you need more information.

Here's some logs and a relevant thread dump.

latest.log
debug.log

threaddump.txt

[Not-February]

I compared my mod list with the mod list originally posted in #12 and did some testing with the mods we had in common.

I wasn't able to reproduce it with only Multiverse installed, so after testing I'm pretty sure it's an interaction with Alex's Caves; I can reproduce the deadlock with only Multiverse 3.0.3 and Citadel 2.6.0/Alex's Caves 2.0.2 installed.

latest.log
debug.log
crash-2024-12-19_02.23.48-server.txt

What's interesting about this is that when I originally encountered the issue, I was using a custom datapack that restricted which biomes Multiverse was allowed to generate with - and Alex's Caves biomes were not on that list(specifically because I suspected their special generation would cause problems). It seems it happens regardless of whether Multiverses are actually configured to allow Alex's Caves biomes to spawn - in the logs I'm providing here, I'm using only the default settings of both mods.

[DavidQF555]

As far as I can tell, I don't think it's an issue of deadlocking. It seems to be crashing relating to a tag missing. I'm working on a structural update right now, and I think it may fix this.