Re: eigs failure

[Ben Abbott]

On Jul 1, 2012, at 11:42 AM, Rik wrote:

> On 06/30/2012 09:45 AM, address@hidden wrote:
>> From: Ben Abbott <address@hidden>
>> To: "address@hidden mailing list" <address@hidden>
>> Subject: new test failure for eigs.cc in stable branch
>> Message-ID: <address@hidden>
>> Content-Type: text/plain; CHARSET=US-ASCII
>> 
>> When 3.6.2 was released, I didn't encounter any unexpected test errors.  Now 
>> I'm seeing the error below.  I don't see anything in the changelog that 
>> looks suspicious.  Before I start bisecting, does anyone have any suspects?
> Ben,
> 
> There is a bug in ARPACK, the underlying library for eigs, that causes
> segmentation faults occasionally.  For a while, we brought the ARPACK code
> into the Octave source tree, patched it, and distributed it with Octave. 
> However, we moved back from this and produced a patched version which is
> available here (http://forge.scilab.org/index.php/p/arpack-ng).  We moved
> the library to be external again so that everyone in the numerical
> computing universe could take advantage of the fixes.  I'd check and see
> what ARPACK you are actually linking against in your build.
> 
> --Rik

Thanks Rik. That makes sense.

I had forgotten about including the MacPorts arpack port in my development 
build until a couple days ago.

Ben