Yes, carbon will fail catastrophically, but the top tube is the least stressed tube on the bike, if that is any comfort. If, seriously, the "damage" came from leaning your bike against a deck, I would be very confident, assertive, and righteous in asking Orbea to warranty it. A crack shouldn't develop from something like that. If they don't warranty it, you have learned something about Orbea. They really should, if you insist. Good luck.