Clogged brake lines?

bad brake hose to the rear is usually the culprit .

Although I replaced all my brakes on my truck the other night and we tried vacuum bleeding the rear brakes and got nothing. Manual bleed nothing. My son saw a drip from the front. I had a small pin hole from rust in the line for rear brakes coming from the master. When we started this job the brakes worked good just a bumping rotor. Thought I was doing the truck some good. All of a sudden no brakes. Could have happened towing some weight though. Just had a heavy road trip.