Re: race condition in writing lilypond-book filenames

[Graham Percival]

On Tue, Dec 15, 2009 at 10:00:20PM +0100, Matthias Kilian wrote:
> [sorry for mumbling to myself too much]
> 
> On Sun, Dec 13, 2009 at 06:53:57PM +0100, Matthias Kilian wrote:
> [...]
> > -        out = file (path + '.ly', 'w')
> > +        out = tempfile.NamedTemporaryFile(mode = 'w', suffix = '.lytmp',
> > +                                          dir = directory, delete = False)
> 
> Unfortunately, this doesn't work with python < 2.6 (because the
> `delete' parameter is new since python-2.6).
> 
> But if you gyys think that the approach of writing (and later
> renaming) temporary files may help, i'll make a better diff tomorrow.

I think that before anybody tries to seriously solve this, we need
a reproducible bug.  Something that fails 5% of the time is very
difficult to solve.  :(

Can you find some abusive combination of lilypond, lilypond-book,
make, -jX options to make, and CPU_COUNT=Y environment variables
to pass to said lilypond-book instances, that produces a reliable
bug?  Getting that far is easily 80% of solving this problem.

Cheers,
- Graham