[SOLVED] Game crashes when using circular procedures that used to work in older versions

SELF SOLVED! I apparently got my code tangled up so it was trying to vein mine air.

Hi, I'm just doing a vein mining procedure, but when I run this vein tick procedure, the game crashes. I am using while loops but I'm using logic that usually works and has worked in previous versions, so I'm not sure if it's user error or a bigger problem. 

The Problem Procedure: https://drive.google.com/file/d/1QjFUlglJG_Hn8Ebd2KHAQQz7PCu1b1I1/view?…

The Crash log: https://drive.google.com/file/d/19B0azhOj-d-Mo_BGZOH6WTbXorCRrgww/view?…