[Octave-bug-tracker] [bug #36104] determinant of a sparse zero matrix

[David Bateman]

Update of bug #36104 (project octave):

                  Status:               Confirmed => Fixed                  
             Assigned to:                    None => dbateman               
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #2:

This could be considered a bug in UMFPACK from my point of view, though it did
point out another problem in the sparse constructor. The issue is that if the
index vectors for empty then the sparse constrctor creates ridx and data
indices that are 0 as they should be used. Apparently UMFPACK checks that
these indices have valid values before doing any calculation even though they
shouldn't be used.

However, if we define nzmax we should have valid ridx and data indicies and as
the constructor stands we don't. So the easiest fix is just to ensure that
ridx and data are valid in all cases. 

See the changeset 8d2ce821e38a

D.


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