crash-2016-02-13_04.15.28-server.txt

The spell mines the 8 blocks starting with the block in front of me and continuing 7 blocks East, 8 total blocks.

Pastebin the spell's export please.

Sorry for the wait. I also had to dig into NBTExplorer to recreate the spell as exactly as possible, since I only had it in a bullet.

It doesn't crash every single time.

This should be it:

http://pastebin.com/63yDG6Hr