I was getting ready to go for a quick fun ride around town (very low traffic due to most people being stuck with their nose on the TV for some sport event). As I usually am pretty careful about checking the bike on a (fairly) regular basis, I checked the tire pressure before taking off. While inflating the tire, I just realize that there's a huge crack on my front tire!!!

This is a tire I recycled from my racing bike, which explains the wear on the tire sides.
Has any of you seen anything like it? This just doesn't look like a crack created by riding on something sharp, it looks more like the rubber just failed.
The tire is a Dunlop GP-A and it's less than a year old. I used it for a couple of track days and a race day.
Guy