[issue448] Merge into renamed directory

[tailgunner]

New submission from tailgunner <tailgunner at smtp.ru>:

Sometimes, when a merge involves a change to a file which resides in a renamed
directory, 
merge algorithm can't figure out that that change should be applied to the
renamed file, and
instead promts "remote changed file foo which local deleted, keep/delete?".

I couldn't come up with with small self-contained reproduction recipe, but AFAIK
the following should suffice:
  make a clone of Mercurial mainline repository
  rename "hgext" to "hg-ext"
  commit
  make another clone
  change some file under "hgext" (I added a space to acl.py)
  commit
Now try to merge both clones.

I think there's a bug in merge.py::findcopies::findold, because if I comment out
this check in findold:
  if fc.rev() < limit:
    continue
problem goes away.

----------
assignedto: mpm
messages: 2512
nosy: mpm, tailgunner
priority: urgent
status: unread
title: Merge into renamed directory

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Mercurial issue tracker <mercurial-bugs at selenic.com>
<http://www.selenic.com/mercurial/bts/issue448>
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