This does not work in practice a lot of the time. What if the problem was actually due to some other thread and said other thread didn't crash? If you only log

This does not work in practice a lot of the time. What if the problem was actually due to some other thread and said other thread didn't crash? If you only log after success/failure, you would have absolutely no idea why the program crashed. Oftentimes if the actual error were anticipated enough for good reporting, said error would not exist in the first place.