Uponor pipe split

I was in the basement today and noticed the water line that feeds the outdoor hose has split. There was a few drops of water still in the line, which I thought had been bled dry. I am assuming that it froze and split, from the look of the pipe, any ideas? The Uponor is connected to copper, for about the last 6 inches before it goes through the concrete wall. The basement is heated.