Hey, seems you've played my game for quite a while, and I really appreciate it! Also thank you for very detailed bug reports. I've noted these bugs and will fix it in some of the upcoming updates! If you have or will found more bugs, please report them too!

So, the first bug seems to occur because of the borders of the world. It's a 2D array of cells, and its dimensions are 100x100 and do not scale if they were crossed. That's why it's causing  "memory access out of bounds" exception. And I suppose it was the ship crossing the borders, because you've  already built some grounds on the same X and Y coordinates as the ground on the picture has. 

So, I'd have to add some kind of auto-resizing algorithm, which would be triggered as the border was crossed. 

Well, you've definitely had a pretty long session! And I should definitely don't wrap these value, or set some kind of maximum value.

That one is not so easy to fix on game design side. I probably should allow the ship to cross some ground just temporarily, or to auto-build a bridge from that ground to the  main base. 

Also, that made me to think about, what would happen if the player would build some blocks around the ship itself.  It would also stop the game as that would be a similar bug, so you've discovered two of them!