MarsSeed [1] filed a deletion request for kqrcode [2]: This EOL KDE4 package is broken, due to KDE4's core library, AUR/kdelibs being unbuildable for almost a year now.
But this is not useful to keep. KDE4 desktop is dead and no longer exists in Arch/AUR repos. And there are working alternatives. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/kqrcode/
