If you want to get into the big leagues, you cannot allow issues linger for 6 days or more on the belief that it is an upstream issue.
I’ve opened a ticket with the devs of package-query:
and have asked them to look at /usr/lib/yaourt/util.sh, line 190 and give their opinion as to what the problem is.
Someone needs to own this issue and I don’t think the maintainers of package-query are obliged to fix an issue in the yaourt implementation, do you?
Please escalate this issue and advise at your earliest.