Describe the bug
A volcano generated in my world in an Extreme hills biome, and reached the height limit, so while it was generating, it crashed my world trying to build over the height limit, I assume.

To Reproduce
Steps to reproduce the behavior:

1. Go near the top of the skybox
2. Generate a volcano

Versions
Chocolate Quest Repoured: Alpha 21.1
Forge: Forge 1.12.2-14.23.5.2847
Minecraft: 1.12.2

Other
Log file:
crash-2020-04-26_12.49.22-server.txt

Singleplayer/Multiplayer: Singleplayer
Other mods (that are necessary to produce the bug):
Other mods (that are also installed): too many. I'm not listing all 250~ other mods.

bug should be fixed in the latest version. please download that and try to reproduce the bug on a new world