[Octave-bug-tracker] [bug #41714] Imagesc causes bus error when drawing large images

[Arun Giridhar]

URL:
  <http://savannah.gnu.org/bugs/?41714>

                 Summary: Imagesc causes bus error when drawing large images
                 Project: GNU Octave
            Submitted by: arungiridhar
            Submitted on: Wed 26 Feb 2014 03:25:10 PM EST
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  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:

Octave exits with a bus error (signal 7) when one passes a large matrix to
imagesc. This is using the Qt graphics toolkit on 64-bit Ubuntu 12.04. Using
surf on the same large matrix works OK.


>> graphics_toolkit
ans = qt
>> n = 1000; imagesc(rand(n,n)); colorbar ## works
>> n = 4000; surf(rand(n,n)); colorbar ## works
>> n = 4000; imagesc(rand(n,n)); colorbar ## exits with bus error (signal 7)





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