bugGNU Octave - Bugs: bug #61205, [octave forge] (control) Test...


bug #61205: [octave forge] (control) Test failures with LAPACK 3.10.0

Submitted by:  Sébastien Villemot <svillemot>
Submitted on:  Wed 22 Sep 2021 10:09:03 AM UTC  
Category:  Octave Forge Package Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  None Assigned to:  None
Originator Name:  Open/Closed:  Open
Release:  other Operating System:  Any

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Wed 22 Sep 2021 10:55:25 AM UTC, comment #1: 

Actually the test in cfconred.m also fails in a similar way on some platforms (arm64, ppc64el, s390x at least), see:

Sébastien Villemot <svillemot>
Wed 22 Sep 2021 10:09:03 AM UTC, original submission:  


Six tests of the control package fail after the upgrade to LAPACK 3.10.0:
- one test in btaconred.m
- one test in btamodred.m
- three tests in moen4.m
- one test in hnamodred.m

I attach a Debian build log that shows all the test results.

Those are apparently only sign changes, most likely due to the fact that LAPACK returns another (but still) valid solution than the one that is hardcoded in the test cases. In particular, I have observed that in LAPACK 3.10.0 the SVD routines can return singular vectors with the opposite sign compared to LAPACK 3.9.

Sébastien Villemot <svillemot>


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Attach Files:

Attached Files
file #51952:  octave-control_3.3.1-2_amd64.build added by svillemot (316KiB - application/octet-stream)


Depends on the following items: None found

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    Date Changed by Updated Field Previous Value => Replaced by
    2021-09-22 svillemot Attached File- => Added octave-control_3.3.1-2_amd64.build, #51952

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