Re: [Bug-gsl] Possible bug in gsl_multifit_wlinear_svd

[Marco Lombardi]

Excellent, I am happy that the bug can be reproduced and that somebody
will look into it.  Regards,

Marco

On 8/9/07, Brian Gough <address@hidden> wrote:
> At Wed, 8 Aug 2007 23:47:01 +0200,
> Marco Lombardi wrote:
> > Sorry for the delay of this reply, I was on a trip last week.  I am
> > running the test on a Mac, specifically on a MacBook Pro, with Mac OS
> > 10.4.10 and gsl 1.9 installed.  The test also fails on various linux
> > boxes I tried (e.g., RedHat with kernel 2.6.18, or Debian with kernel
> > 2.6.21).  As far as I can tell, the problem is there also in gsl 1.8.
> >
> > I suspect that you cannot reproduce the bug because the data file was
> > not correctly transfered or read.  To (at least) exclude the first
> > possibility, here is the md5 checksum of the file:
> >
> > $ md5sum gsl-test.dat
> > 768b5a964b8ce98932ed0618ac9f97e1  gsl-test.dat
>
> Thanks, I have the file with the same md5sum.  I have looked again and
> found that the problem occurs when the library is compiled with SSE
> floating point (and so presumably is something to do with underflow,
> which is handled differently in that case) -- I will log that bug to
> be fixed in the next release.  Thanks for the bug report.
>
> --
> Brian Gough
>
> Network Theory Ltd,
> Publishing Free Software Manuals --- http://www.network-theory.co.uk/
>