What should reconcile do if a file version's parent is a ghost?

[Andrew Bennetts]

Andrew Bennetts wrote:
> Hi all,
> 
> I'm working on Aaron's branch that teaches reconcile how to fix the corruption
> we have in bzr.dev, where the parents recorded in the per-file knit index (i.e.
> the per-file version graph) are incorrect when compared to the revision graph.

I should clarify what I mean by "corruption" so I don't unnecessarily alarm
people.  This issue is an inconsistency in an index, not in the stored data
itself.  There are no data loss concerns here; it's completely repairable.

-Andrew.