MarsSeed [1] filed a deletion request for ros-melodic-message-filters- git [2]:
Dead package from 2019; upstream is EOL and abandoned since 2022. [a] PKGBUILD tries to execute a script (fix-python-scripts.sh) from ros- build-tools, which the latter no longer carries. [a]: https://github.com/ros/ros_comm/tree/melodic-devel [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/ros-melodic-message-filters-git/
