zoorat [1] filed a deletion request for trf [2]:

Dead source (open 'trf407b.linux64' and 'trf407b.linux' file link in browser and you will see a server saying "A system error occurred. Please go back and try the download again.". so, while building you will get a "==> ERROR: One or more files did not pass the validity check!"), orphan, Last Updated: 2015-06-23 22:47.

[1] https://aur.archlinux.org/account/zoorat/ [2] https://aur.archlinux.org/pkgbase/trf/