Jeff King <p...@peff.net> writes:

>> With "natively" do you mean some internal state that is never written
>> into the index? If this were the case then there wouldn't be any
>> problem with the restriction when reading the index file.
>
> FWIW, that was my question on reading Junio's response, too.

The current code may not put two stage #1 entries for the same path
but allowing such entries was a part of the design from very early
days; iow it is a valid index file, unlike the one that has both
stage #0 and stage #1 for the same path.  It is a no-no to reject
such an index as long as we are discussing to add a new code to
tighten the sanity check on the file content.

>> I have also tried to reproduce it by directly calling
>> git-merge-recursive and the most I have got is what it seemed to be
>> like a conflict in the stage #1:
>> 
>> $ git ls-files -s
>> 100644 1036ba5101378f06aa10c5fa249b67e14f83166b 1 conflict
>> 100644 2638c45f8e7bc5b56f70e92390153572811782c3 2 conflict
>> 100644 178481050188cf00d7d9cd5a11e43ab8fab9294f 3 conflict
>> 
>> $ git cat-file blob 1036ba5101378f06aa10c5fa249b67e14f83166b
>> <<<<<<< Temporary merge branch 1
>> G
>> =======
>> E
>> F
>> >>>>>>> Temporary merge branch 2
>
> Yes, I think merge-recursive resolves the earlier merges and then feeds
> the result into the main merge. And that's how you end up with the
> "temporary merge branch" name instead of something useful.

Yes---that is what I meant by the "virtual stuff".  Unlike resolve
work by Daniel (around Sep 2005 $gmane/8088) that tried to use
multiple ancestors directly in a single merge, recursive limits
itself to repeated use of pairwise merges.
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