martinvonz added inline comments.

INLINE COMMENTS

> pulkit wrote in test-rebase-conflicts.t:460
> I think it will be weird to have current parents as 7 and 8. Rebase copies 
> commit, so if there is a merge commit, it copies it instead of recreating 
> one. Also if we have 7 and 8 as parents, we might not have correct conflicts.

I made more arguments for changing it in the next patch (D7827 
<https://phab.mercurial-scm.org/D7827>). See if those can convince you :)

I'm not sure what you mean about not having correct conflicts. Related to that, 
I think it's actually weird (with how it's currently done) how you would not 
see any changes made between the merge base and the rebase base. So if there 
had been commits between `A` and `C` here and we were rebasing from `C`, we 
would not see those changes in the working copy. That's of course correct, but 
the dirstate's two parents suggest, IMO, that we're merging the two commits, so 
we should see those changes.

I can see the value in having the thing you're grafting in as a working copy 
parent because it makes it appear in the `hg log` output as a reminder. 
However, I don't think that's what the purpose of the dirstate parent should 
be. We could perhaps add another  mechanism for showing the commit that's being 
rebased, and maybe also the base (which is generally not the merge base).

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D7824/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D7824

To: martinvonz, #hg-reviewers
Cc: pulkit, mercurial-devel
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