With that one, at least your parser should crap itself right around where the error is. You probably just need to search engine the error message, and find the page every other noob has to. Then it won’t take too long.

If your thing compiles but doesn’t work, then the real fun begins. You’re in the magical land of Turing completeness, where you hope the problem isn’t unsolvable in your case, because it definitely is in general.