bug: wrong order of messages in notmuch-show

[Gregor Zattler]

Dear notmuch developers,

notmuch sometimes shows emails of one thread in wrong order.  Now
I found an example in a public mailing list so it is possible to
share this example.  It is a small thread from the notmuch
mailing list, you might find it by searching for id:87zhzccrwg.fsf at tethera.net

While this email is the last written and sent in this thread it
is shown as first email in the notmuch show output, as shown in
this "screenshot" of the corresponding notmuch-emacs buffer:

      File Edit Options Buffers Tools Help
      'notmuch search thread:<>' lists multiple threads
-->   David Bremner <david at tethera.net> (Yest. 15:42) (inbox new unread)
      Subject: Re: 'notmuch search thread:<>' lists multiple threads
      Naveen N. Rao <naveen.n.rao at linux.vnet.ibm.com> (April 06) (inbox new unread)
       Naveen N. Rao <naveen.n.rao at linux.vnet.ibm.com> (April 06) (inbox new unread)
       David Bremner <david at tethera.net> (April 08) (inbox new unread)
        David Bremner <david at tethera.net> (April 09) (inbox new unread)
         David Bremner <david at tethera.net> (April 10) (inbox new unread)
         Subject: [PATCH] devel: add new tool to draw thread structure
         Naveen N. Rao <naveen.n.rao at linux.vnet.ibm.com> (April 18) (inbox new unread)
         Subject: Re: 'notmuch search thread:<>' lists multiple threads
          David Bremner <david at tethera.net> (April 22) (inbox new unread)


This happens often to me with emails from a ticket system which I
cannot disclose.  In this kind of technical threads order is
necessary to understand current status of affairs.

I did a test with notmuch 0.27+7~gfd3c936 and .notmuch-config
pointing to a test maildir with this 8 messages as they arrived
at my email account.  I saved a tar archive of this in case this
is important to debug the problem.

Thanks, for your attention, Gregor