Crash with c2me and any datapack

[Zintux]

Server crashes after ~3 seconds when enabling worldthreader_Active gamerule (or just joining when it's arleady true) while both c2me mod and blazeandcaves datapack are installed

Description: Exception ticking world java.util.ConcurrentModificationException: Async ticking server chunk manager at knot//MC//net.minecraft.server.world.ServerChunkManager.handler$zzk000$c2me-fixes-general-threading-issues$onTick(ServerChunkManager.java:3637) at knot//MC//net.minecraft.server.world.ServerChunkManager.tick(ServerChunkManager.java) at knot//MC//net.minecraft.server.world.ServerWorld.tick(ServerWorld.java:355) at knot//no2.worldthreader.common.ServerWorldTicking.tickThreaded(ServerWorldTicking.java:67) at knot//no2.worldthreader.common.ServerWorldTicking.runWorldThread(ServerWorldTicking.java:36) at knot//no2.worldthreader.common.thread.WorldThreadingManager.lambda$new$0(WorldThreadingManager.java:66) at [email protected]/java.lang.Thread.run(Thread.java:1583)

Video how to reproduce: https://youtu.be/HHEU1wle1W0 (works with old worlds too) Full log: https://mclo.gs/envCHZG Datapack link: https://modrinth.com/datapack/blazeandcaves-advancements-pack

Mod list: c2me-fabric-mc1.21.4-0.3.1.2+rc.1.0 fabric-api-0.119.2+1.21.4 lithium-fabric-0.15.1+mc1.21.4 mixintrace-1.1.1+1.17 modmenu-13.0.3 sodium-fabric-0.6.10+mc1.21.4 StackDeobfuscatorFabric-1.4.3+08e71cc Worldthreader-2.0.7

[Zintux]

I don't know why i didn't test this earlier but it seems that it crashes with any other datapack as well. Also confirming that issue still persists with latest version of every mod on 1.21.5 Video where i did the same thing but with hud coordinates datapack from vanilla tweaks: https://youtu.be/KcFK1vgs9ow (there was no fps lag upon creating world, obs just skipped some frames because my cpu was 100% utilized) Crash log: https://mclo.gs/IQ7REVY There's no crash if you disable either c2me, worldthreader gamerule, or datapack

Mod list: c2me-fabric-mc1.21.5-0.3.2+beta.1.0 fabric-api-0.119.6+1.21.5 lithium-fabric-0.16.0+mc1.21.5 mixintrace-1.1.1+1.17 modmenu-14.0.0-rc.2 sodium-fabric-0.6.13+mc1.21.5 StackDeobfuscatorFabric-1.4.2+bf1fc22 Worldthreader-2.1.1

[2No2Name]

This is a mod incompatibility with C2ME

[EGOIST1372]

@2No2Name is it going to be solved or it's just a wont fix issue? Thanks in advance <3

[2No2Name]

Not sure, haven't found out why this happens