https://pastebin.com/Ze6WdTER
???

I'll also say that I suspect that your core might be having issues with the 1.12.2 version of buildcraft.

Same here for the ender Lillies. But that issue is not related to this one as lagging while holding an ender lily was an issue before Buildcraft came out with a 1.12.2 version. Trust me, I KNOW!

Same here. Was playing with the direwolf20 pack and had MAJOR issues while holding ender lillies.
https://pastebin.com/XtfyUkt4

Interesting. Because the crash of which I pastebined uptop happened upon holding a stack of exactly 33 ender lillys in my hand. Extreme lag > crash after 5 minutes of freeze and no interaction. ...

Well this is my experience anyways. Also I don't play with buildcraft. So I don't think it conflicts with that...

This is extremely weird, Ill be able to investigate this further next weekend

Small update: I updated to the latest of all mods, seems to be fixed for now? Will update thread if I find anything new.

I just started getting this crash. I have enderlilies disabled and we don't have Buildcraft installed.

Restoring the world to a backup from before the crash started happening doesn't seem to help, either.

https://gist.github.com/belathus/0a2e473a05dc5db91ff9d30cac6a372c

Setting "B:GlassCables=false" from ae2 mod fixed it

Edit: Unloading each chunk before unloading the world doesn't crash.

I had it as well.

https://pastebin.com/KAXjkFGc

seems like various issues are popping up here.

Server has yet to crash after I wiped my rftools dimensions, well, dimensions.