Crash on startup of heavily modded game. It brought me to this screen: https://i.imgur.com/X2Ej8Es.png

The only change I made was deleting a standalone mod from the modlist. I do not believe that's relevant.

Crash report and latest log: https://gist.github.com/katubug/aa879f4aa2d8cff1f007c8fd0484350d

I'm using architectury-9.1.12-forge.jar, Forge is version 47.2.17

Thanks for your time!

Just started up the game without issue. I'm not sure what could have caused it, but I guess it's fine now? I'll leave this open in case you want to look at it, but otherwise feel free to close the issue.

at net.minecraft.client.color.item.ItemColors.handler$znn000$embeddium$preRegisterColor

Appears to be an issue with Embeddium, not really sure what. I don't think it's related to Architectury.

I'll chalk this one up to "modded mc be like that sometimes," but I'll keep the embeddium thing in mind in case it keeps happening. Thanks!

FastUtil collections are not thread safe and do not check for thread safety like the built in collections, so this is likely a concurrent modification issue, meaning it will happen sporadically. Definitely something you should report to embeddium.

This appears to be an Architectury bug, AFAIK the vanilla color map is not thread-safe and so event.enqueueWork should be used inside the event handler.

I've been told by embeddium "This is their bug, they are registering colors on a worker thread instead of queuing the work properly"

Ah, I see. I'll reopen this for further investigation then.