Hi David,

David Bremner wrote:
> "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com> writes:
> 
>> In my case, I seem to be having the In-Reply-To headers. I end up with 
>> two files per message: one from my inbox and one from the gmane archive 
>> that I pull in. All the messages from the gmane archive seem to have a 
>> re-written 'In-Reply-To' header, but 'Message-Id' and 'References' are 
>> the same.
> 
> That sounds like essentially the same issue, due to the fact that
> notmuch prefers In-Reply-To when choosing a parent for a message.
> 
> Currently the database is correct (or at least one not-crazy definition
> of correct): all of the reference and in-reply-to terms are attached to
> the message document in the database. On the other hand, the in memory
> data structures currently assume that In-reply-to is a unique value
> (with ties broken at indexing time).
> 
> It might be that the solution is to read a list of in-reply-to values
> and use all of them in threading. At a quick glance, that looks doable;
> I'm just not sure about unintended consequences.

Were you able to look into this again?
Using a list of in-reply-to values sounds like a good option, though I 
clearly have no idea about other consequences from that. If you have a 
patch, I can help test that.

Thanks,
Naveen


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