'notmuch search thread:<>' lists multiple threads

[David Bremner]

David Bremner <david at 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