ports/165960: Important SVD bug in Lapack 3.4 -- PLEASE patch port
fork
forkandwait at gmail.com
Mon Mar 12 02:30:18 UTC 2012
>Number: 165960
>Category: ports
>Synopsis: Important SVD bug in Lapack 3.4 -- PLEASE patch port
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-ports-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Mar 12 02:30:11 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: fork
>Release: 9.0 Release
>Organization:
>Environment:
FreeBSD mustafa 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:15:25 UTC 2012 root at obrian.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
>Description:
The latest lapack has a bug in the way it handles something related to singular value decomposition (SVD). A LOT of algorithms depend on SVD lapack downstream, so this is pretty important to fix. Especially as it impacts my dissertation code ;)
Here is the Lapack bug (they might understate its importance):
http://icl.cs.utk.edu/lapack-forum/archives/lapack/msg01219.html
Thanks!
>How-To-Repeat:
I encounter the problem in Octave. So... run octave, and you get the following. You should NOT see an error in line #2:
1> aa = rand(2,4)
a =
0.67848 0.87562 0.32506 0.53669
0.42031 0.70204 0.37300 0.34772
2> svd(a)
** On entry to DORGLQ parameter number 5 had an illegal value
error: svd: exception encountered in Fortran subroutine dgesvd_
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
More information about the freebsd-ports-bugs
mailing list