Version 2.5.2 is available upstream. Please consider updating!
It seems that version 2.5.2 is available upstream, while the latest version in the Gentoo tree is 2.5.1. You think this warning is false? Read more about it here.
Afio makes cpio-format archives. It deals somewhat gracefully
with input data corruption, supports multi-volume archives during interactive
operation, and can make compressed archives that are much safer than compressed
tar or cpio archives. Afio is best used as an 'archive engine' in a backup