This is a fairly minor problem, but the package metadata for perl-Gtk2-Unique is out-of-date. It currently lists the project's URL as
but GNOME no longer uses the "live" subdomain; requests now get redirected to the wiki. The newer equivalent URL is
...but that page says libunique is deprecated and offers a link to the GtkApplication porting guide.
(I'm filing this same bug report for multiple packages, so I apologize if you see this issue twice.)
This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle.
Changing version to '26'.
perl-Gtk2-Unique and perl-Gtk2-Unique-devel still use the old live.gnome.org domain.
I wondered briefly if maybe the package should just be removed, if upstream isn't developing it anymore. From a quick dnf repoquery, it seems only pacmanager still requires perl-Gtk2-Unique, and nothing seems to require the -devel package. But I'm not sure whether or how much pacmanager is still used.
At the very least, it would still make sense to update the package URL, as I noted in my original comment.
This bug appears to have been reported against 'rawhide' during the Fedora 29 development cycle.
Changing version to '29'.
I've submitted a pull-request to do this.
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URL was updated at some point to Meta CPAN. Belated thanks!