Changing the Cluster Rarity of all stone types to 0, then starting a new world will cause an infinite loading screen.

Not sure if this a bug per se or a interface problem or me getting my wires crossed. It works like that in cofh world and the right option next to it ("enabled" = true/false) was misleading me to think it would disable the blocks themselves.

Pastebin
MC 1.12.2, Forge 14.23.1.2575, Quark r1.4-120, AutoRegLib 1.3-15

I can't believe you've done this.