[Octave-bug-tracker] [bug #40460] logm crashes with large enough matrices

[Carnë Draug]

URL:
  <http://savannah.gnu.org/bugs/?40460>

                 Summary: logm crashes with large enough matrices
                 Project: GNU Octave
            Submitted by: carandraug
            Submitted on: Sun 03 Nov 2013 07:00:24 PM GMT
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

The following fails for me building from cset 2ff47214de72:


octave:1> logm (rand(91))
panic: Illegal instruction -- stopping myself...
Illegal instruction


I get the same crash for any matrix bigger than 90x90. I may have something
weird on my system that is causing this since a similar line appears on the
tests for profile (that's actually how I found out about this. Because of the
crash I can't run the test suite).

Running logm line per line, the crash happens in the following line


  s = 2^k * u * s * u';


where K, u and s are


        k              1x1                          8  double
   c    s            100x100                   160000  double
   c    u            100x100                   160000  double






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