#12413: Sage crashes in matrix/vector multiplication with zero extents
------------------------------+---------------------------------------------
Reporter: JStarx | Owner: jason, was
Type: defect | Status: positive_review
Priority: critical | Milestone: sage-5.0
Component: linear algebra | Keywords: sd36
Work_issues: | Upstream: N/A
Reviewer: Volker Braun | Author: Martin Albrecht
Merged: | Dependencies:
------------------------------+---------------------------------------------
Changes (by vbraun):
* keywords: => sd36
* status: needs_review => positive_review
Old description:
> The following crashes Sage 4.8 on OS X 10.6.8 with a mysterious message:
>
> {{{
> sage: Y = (GF(3)^1)/(GF(3)^1)
> sage: Y((1,))
> lda must be >= MAX(N,1): lda=0 N=0Parameter 7 to routine cblas_sgemv was
> incorrect
> Mac OS BLAS parameter error in cblas_sgemv, parameter #0, (unavailable),
> is 0
> d-69-91-159-193:devel Starx$
> }}}
>
> I have not yet been able to find the error, the problem may be with a
> call to LinBox, as discussed here: http://groups.google.com/group/sage-
> support/browse_thread/thread/30bfc9922b26f3d7 but I am not yet sure.
New description:
The following crashes Sage 4.8 on OS X 10.6.8 with a mysterious message:
{{{
sage: Y = (GF(3)^1)/(GF(3)^1)
sage: Y((1,))
lda must be >= MAX(N,1): lda=0 N=0Parameter 7 to routine cblas_sgemv was
incorrect
Mac OS BLAS parameter error in cblas_sgemv, parameter #0, (unavailable),
is 0
d-69-91-159-193:devel Starx$
}}}
I have not yet been able to find the error, the problem may be with a call
to LinBox, as discussed here: http://groups.google.com/group/sage-
support/browse_thread/thread/30bfc9922b26f3d7 but I am not yet sure.
Apply trac_12413_linbox_crash.patch
--
Comment:
Looks good!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12413#comment:13>
Sage <http://www.sagemath.org>
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