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From: David Bremner <david@tethera.net>
To: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>, notmuch@notmuchmail.org
Subject: Re: 'notmuch search thread:<>' lists multiple threads
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References: <1523007700.l8xm6nm6af.naveen@linux.ibm.com>
 <87sh86v1oc.fsf@tethera.net>
Date: Mon, 09 Apr 2018 08:54:01 -0300
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David Bremner <david@tethera.net> writes:

> At least some of this mail data is public, but I'm not sure if the bad
> threading is reproducible or not; I want to run a complete census
> overnight before I reindex.
>
> Even if the bug is non-deterministic, it probably lives in lib/add-message.cc

I have a reproducible test for this bug now

  http://pivot.cs.unb.ca/git?p=notmuch.git;a=shortlog;h=refs/heads/fix/thread-search

I still need to analyze the mails a bit more, but it looks like at least
one of the strange results is caused by multiple mail files sharing the
same message-id, but with different References headers (and no
In-Reply-To headers).

d