When the treefolk fertilizes Alpha Grass from Regions Unexplored it oftentimes results in a crash. Using Primal Magick 4.0.9 and RU 0.5.5 (both newest at the time of writing). Tested on both multiplayer server and singleplayer world. No such situation happens when I use bonemeal on the Alpha Grass (often Alpha Grass requires more than one bonemeal to produce anything and does not create grass around the given block; maybe there's the problem).

Steps to reproduce:

1. Create/find a patch of Alpha Grass from Regions Unexplored.
2. Spawn a treefolk and wait for it to fertilize the terrain (possibly more than once; occasionally works as intended)

Result:

• crash

Expected result:

• behavior analogous to a single/multiple (?) application/s of a bonemeal

Crash log:
crash-2024-07-03_13.06.07-server.txt

Thank you for the report. I'll investigate the crash when I get a chance and try to fix the underlying issue. In the meantime, you should be able to work around this by using a datapack to add the Alpha Grass to the "treefolk_fertilize_exempt" tag, which you can find in /data/primalmagick/tags/blocks.

That's a neat and clean workaround, thank you and good luck!