Perhaps this depends on what you tried to fail at in the first place.
You have either succeeded at failing what you first intended to fail, and thus have both failed and succeeded.
Or you have succeeded at what you first intended to fail and thus failed at trying to fail.
So either way you have both succeeded and failed.
Which of the two is the more appropriate outcome, would be left entirely up to your own perspective.
From another aspect - taking an outlooking stance over the big picture. If you were trying to fail overall, and managed to succeed, then I guess neither would be true or both would be true. I'm kind of confused so I'll just assume you made a hole in the universe.
From a philosophical stance - Many failures promote the success of learning from them.