Weekend plumbing excitement

So Nick and I were cleaning up the basement playroom when I went to move something and found it wet to the touch. Not good. We did some sleuthing and figured out that it was the sewer pipe running from our upstairs bathroom down to the basement. I had to open up a wall in the dining room to find the leak. Turns out a prior owner had probably found and patched a hairline crack in the pipe, covering over the repair with a piece of drywall. The patch failed, now many years later, and as a result I have a big hole in my dining room wall:



Since this was a Saturday afternoon, I was hoping to avoid making an emergency call to a plumber. Luckily I was able to make a temporary patch to the pipe using some epoxy - the battleship gray goo in the picture below - and that has kept it from leaking for the moment:



I have some plumbers coming tomorrow to quote me prices on a repair - while I could possibly leave the pipe as is for a while, I am guessing the crack is a harbinger of further trouble in that section. Then it will be time for drywall repair. Fortunately, drywall is incredibly cheap right now. Fun!