I too, in my humble opinion, find "program line" to be a horrible title. It's not a question. It's a thing. It's ambigious. Congratulations if you can correctly guess what the question is going to be, but i find that there a lot of poorly chosen subject titles because it is hard to come up with a synopsis that describes the question succintly enough to fit. Most SoPW are too busy concentrating on their problem, and coming up with a good title is second to getting their question answered.
"How Do I Get the Line Number In My Error Message?" is much much better, in my humble opinion.
Even better would have been "How Do I Get the Program Line Number In My Error Message?" ;)