[Octave-bug-tracker] [bug #54043] Octave crashes if eigs is called with singular B matrix

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?54043>

                 Summary: Octave crashes if eigs is called with singular B
matrix
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Sun 03 Jun 2018 09:50:08 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Segfault, Bus Error, etc.
                  Status: None
             Assigned to: None
         Originator Name: Octave user
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.2
        Operating System: Microsoft Windows

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Details:

According to the documention, eigs can be used only for positive definite A
and B matrices. However if matrix A or B are not positive definite, an error
code should be returned or an exception should be thrown.

If you run the following example then octave crashes.


clear all;
load eigs_test.mat;
try
[v, lambda] = eigs(K, M);
catch
end_try_catch
fprintf(stderr, "test OK\n");





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File Attachments:


-------------------------------------------------------
Date: Sun 03 Jun 2018 09:50:08 AM UTC  Name: eigs_test.m  Size: 128B   By:
None

<http://savannah.gnu.org/bugs/download.php?file_id=44283>
-------------------------------------------------------
Date: Sun 03 Jun 2018 09:50:08 AM UTC  Name: eigs_test.mat  Size: 107KiB   By:
None

<http://savannah.gnu.org/bugs/download.php?file_id=44284>

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