MarsSeed [1] filed a deletion request for jdk12-openj9-bin [2]: Cleanup of deprecated JDK 12 short-term support packages.
JDK 12 and its Eclipse OpenJ9 (formerly IBM Semeru) builds are EOL since October 2019. Users should migrate to a newer JDK/JRE. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/jdk12-openj9-bin/
