The network 1.1.1.1/32 is on R1
I was investigating split horizon and EIGRP and I noticed that if router R3 is a stub it will not send back infinite routes through the interface(Gi0/1) that it learned the route(1.1.1.1) from. It will also not advertise the downstream route either to R4 through Gi0/0. I noticed this because show ip eigrp topology all-links was not showing a non successor through gi0/1. Also furthermore after shutting down the backup link Gi0/0(to R2) there is no longer a route to destnation 1.1.1.1(through gi0/1). if you setup R3 as a stub, it appears that leak maps solve all of those problems. I haven’t really seen this in the documentation. There is a post online where a network engineer ran into unreachable networks down stream from a stub.
The answer to the problem was my clue.