While I was creating a Custom Cubic world so I could have generation below level 0 I found an annoying bug while scrolling down the add ore GUI. If I scrolled down far enough Minecraft would just freeze up and crash issuing this crash report.This would have not been a big problem if the preset button would just reject any block I manually type in.

Plain links:
https://paste.ee/p/k8eXu

Use newer version of cubic chunks. It's already fixed.