[bug #68434] Function gsvd crashes when matrices have 10 or more columns

"Dmitri A. Sergatskov" <[email protected]> Tue, 16 Jun 2026 10:34:47 -0400 (EDT)

Newsgroups	gmane.comp.gnu.octave.bugs
Message-ID	<[email protected]>

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Follow-up Comment #19, bug #68434 (group octave):

Yes this is a current limitation of Octave's gsvd implementation based off
Lapack's ggsvd. I am working on matlab's compatible implementation that uses
QR + CS decomposition for rank deficient matrices. This is a fairly
significant change and no-one is going to put it into stable bug-fix. Even in
dev it can easily spent years in limbo aka "code review"... 

The patch fixes memory corruption and some math logic in matrix
re-construction; it retains the current octaves behavior otherwise. 

Sincerely,

Dmitri.
-- 



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