eg:
https://bugzilla.redhat.com/show_bug.cgi?id=1943008 "coccinelle: FTBFS with upcoming autoconf-2.71"
https://bugzilla.redhat.com/show_bug.cgi?id=1943041 "ocaml-curses: FTBFS with upcoming autoconf-2.71"
I followed the links given in both, but as far as I can tell the builds succeeded in both cases. Unless I'm looking at the wrong thing - it's hard to tell.
Rich.