MarsSeed [1] filed a deletion request for perl-crypt-rsa [2]: Package has been broken for a long time, with many nonexistent dependencies.
Also upstream is EOL since 2009, with numerous unfixed defects. [a] No longer needed by the latest upstream version of AUR/perl-net-ssh-perl (which has long been unmaintained too, but just become an orphan). [a]: https://rt.cpan.org/Public/Dist/Display.html?Name=Crypt-RSA [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/perl-crypt-rsa/