Hey guys,

I am trying to exclude any thread that has the tag *killed* but it's
either a bug or something that I am simply doing wrong.

 $ notmuch search tag:work and tag:unread and tag:inbox and not tag:killed | grep 'killed' | wc -l
 1

I am getting the same result with Trusty shipped notmuch v0.17 and with
today's build.

Wael