Sorry for the admin noise, Simon.

I'm splitting this off from issue1030.  The issue here is that when you pull
http://darcs.haskell.org/nofib into a older clean tarball of the same repo, you
can get an error like this:

darcs failed:  takeFile ./real/fem/fem.stdout-x86-linux-0 in
c:/simonpj/darcs/validate-HEAD/nofib/_darcs/pristine: openFd: does not exist (No
such file or directory)

So we would need somebody to reproduce this error somehow or provide a
convincing claim that it has been fixed.

Note that you may need to use --old-fashioned to reproduce the conditions.

I suspect that by round tuit scarcity and also by the slow phase-out of
old-fashioned repositories (in favour of hashed ones), we'll never get
around to reproducing this :-(