Probably a regression from ports r425933 as I didn't see it with 5.0.6_4.
$ poudriere testport -j 110i386 -o editors/libreoffice
====> Running Q/A tests (stage-qa)
===> Checking for items in STAGEDIR missing from pkg-plist
Error: Orphaned: share/bash-completion/completions/libreoffice.sh
===> Checking for items in pkg-plist which are not in STAGEDIR
===> Error: Plist issues found.
*** Error code 1
A commit references this bug:
Date: Sat Nov 12 18:50:35 UTC 2016
New revision: 425984
Add bash-completion files to the package
Reported by: jbeich