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svds check fail in 3.8.0


From: Markus Appel
Subject: svds check fail in 3.8.0
Date: Thu, 23 Jan 2014 21:09:42 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0

Hi,

I just built 3.8.0 on Ubuntu 12.04 64bit (all standard config options),
and one of the svds checks fails:

>   ***** testif HAVE_ARPACK, HAVE_UMFPACK
>  [u2,s2,v2,flag] = svds (A,k,0,opts);
>  s2 = diag (s2);
>  assert (flag, !1);
>  tol = 10 * eps() * norm(s2, 1);
>  assert (s2, s(k:-1:1), tol);
>
> warning: returning fewer singular values than requested
> warning: try increasing the value of sigma
> !!!!! test failed
> ASSERT errors for:  assert (,)
>
>   Location  |  Observed  |  Expected  |  Reason
>      .          O(6x1)       E(7x1)      Dimensions don't match

I found a very old discussion on the bug tracker about something what
seemed similar: http://savannah.gnu.org/bugs/?29721
However, when I remove the arpack libraries as suggested there, the
problematic test cases are skipped. Building 3.8.0 on a different but
similar system with identical versions of libarpack2(3.0.2-3) and
libarpack++2(2.3-2) doesn't fail the check.

Any idea what I can do or check to zero in on the error?

Markus


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