Oh I was desperate. I was the most junior guy in the team on my first job after school whom got thrown with a hard problem. Luckily I remembered __FILE__ and __LINE__ in C, and it was a matter of working backward to link those to malloc and free somehow. My Unix command-fu (sort, uniq -c) learned back in school came through in dealing with the huge log file.
It was a huge boost to my confidence on my job and earned my cred with the team.
