I loaded up MCEdit and tried deleting possibly offending chests but to no avail. Whenever my character came inside the range of where the chest even was it would crash. So I went back into MCEdit and started deleting entire chunks from the area. This was a very bad idea. I assumed that if those chunks were to be deleted, then when I return they would be generated again. It was not so. I still could not get to those areas without crashing. Meaning whether or not they could be regenerated is currently unknown, however I have my doubts. 10 or so chunks were permanently removed from the game.
So with this futile situation I went ahead and deleted the save. I need to take the time to find what is causing this error. I attempted to reproduce this on a save devoted to testing MineColony but could not. Perhaps it is due to faulty interactions between MineColony and Millenaire?