For example, with segmentation faults, you need to know on which line of code the seg fault occurred.

Here in SEG Square, the products of those suppliers fill glass cases and hang from pegboards in vast, low-ceilinged grottoes that would echo if they weren’t crammed wall to wall with vendors’ stalls.

SEG Square's markets are crowded, loud, and mildly mephitic from cigarette smoke and the odor of fresh-baked electronics.