Yep....ductape. Or is that duct tape? I'm not sure.
I'm sure in Australia it's called something like "Stickykooklawidgitsholdmyskivviesup" tape. :-D
But they shorten everything...I think that it is just called "sticky"! As in "hoand me the stickie, mate, oiv got a leak in moi smokie!".
At least I think that that's what my tazzy brother in law would say!
I can't think of a glue that would work...unless....unless you were to patch it with another piece of vinyl, I have a quick set rubber pool for my kids ( a real big bruiser too!) and comes with (and I've used plenty) a vinyl patch and some kind of vinyl glue, I think it allows for some stretching. Something like that might work.
Other than that, I'd recommend the more temporary solution of duck duct ductape.