Bug Report

Mods such as Mekanism, Ice and Fire cause minecraft to crash when starting or creating a world that had BOP settings enabled.

The crash only seems to be on 12.0.0.408, i've tried 12.0.0.405 and i had no issue.

How can the crash be reproduced?

Creating a new world, or starting a world generated with BOP

Crash Report and Logs

crash-2020-10-12_21.17.46-server.txt

Mod Version

BiomesOPlenty-1.16.3-12.0.0.408-universal

Minecraft doesn't crash if i remove Mekanism and/or Ice and Fire. Not sure what other mods cause the crash but these were the ones that caused it with BOP together.

Having this same issue, I have both Mekanism and Ice and Fire installed.

It's possible that they have outdated BOP support or something. Seeing as it's pinned down to those potential mods, I'd suggest reporting it to them as well.

Not sure if this helps to provide, It also crashes with the mod "fast-leaf-decay"

Not sure about Ice and Fire, but the only BoP specific support Mekanism has is recipes we add that are conditioned behind BoP being loaded (one behind a min version of BoP being loaded for the orange sandstone). So I don't see how that could cause an issue with where the crash is in the BiomeProvider. Other than that we only register some features to biomes using forge's BiomeLoadingEvent and in Mekanism Additions register spawns to biomes and structures that have specific mob types using the BiomeLoadingEvent and StructureSpawnListGatherEvent

I have figured out the issue, it seems to be a thing with CraftPresence. Apon doing some looking around, removing this mod made everything work