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

From: Arun Giridhar
Subject: [Octave-bug-tracker] [bug #41714] Imagesc causes bus error when drawing large images
Date: Wed, 26 Feb 2014 20:25:12 +0000
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:27.0) Gecko/20100101 Firefox/27.0


                 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



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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