MarsSeed [1] filed a deletion request for java8-openjdk-xdg [2]: Don't duplicate repo's java8-openjdk package for a minor improvement. File a bug report / feature request for it.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/java8-openjdk-xdg/
