I can confirm that the underlying bug still exists in today's artful
nightly CD.

I wasn't able to get a search path to stick in /etc/resolv.conf, but
setting Domains=ubuntu.com in /etc/systemd/resolved.conf triggers the
same bug: It breaks resolution for ubuntu.com and www.ubuntu.com (and
probably all other subdomains as well), and www doesn't resolve either.
nslookup reports SERVFAIL; systemd-resolve reports "No appropriate name
servers or networks for name found".

Testing this on my 17.04, I enabled systemd-resolved logging. The output
for "affected" domains (ie. ones named in the search path) listed
"LLMNR"; for other domains it listed "LLMNR" and "DNS" strategies. I
will try to reproduce this in the artful VM and will hopefully be able
to post the debugging output tomorrow.

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https://bugs.launchpad.net/bugs/1714803

Title:
  Search list in resolv.conf breaks resolving for that domain

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