[Octave-bug-tracker] [bug #43043] Segfault with CTRL-C

[Ceral Paquet]

URL:
  <http://savannah.gnu.org/bugs/?43043>

                 Summary: Segfault with CTRL-C
                 Project: GNU Octave
            Submitted by: octavebugs
            Submitted on: Thu 21 Aug 2014 05:26:14 PM GMT
                Category: None
                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: 3.8.2
        Operating System: GNU/Linux

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Details:

This is an issue I was seeing on 32-bit version 3.8.1 on my old beater
computer but I am also seeing it on 64-bit 3.8.2 on my new computer.

I am seeing a lot of crashes after using CTRL-C to interrupt a running
program. Not every time but if I start and stop enough times (less than 10)
then it will exit rudely with no message. This is with octave-cli, not related
to the GUI.

I recompiled without optimizations and with debugging symbols + gdb, as
described here: http://wiki.octave.org/Debugging_Octave

However it seems CTRL-C doesn't really interrupt octave in the gdb
environment, rather it passes control to the gdb prompt. So it wasn't possible
to replicate the bug and get a decent bug report.

The following script produces the problem, if you start and stop it (e.g. at
the octave prompt type weird_bug2 then after a few seconds press CTRL-C, then
repeat). On my system it will segfault after 2-10 tries.

%-----------------------------------------------
function weird_bug2()

data = randn(1000,1000,4)+i*randn(1000,1000,4);
X = randn(7,7,4)+i*randn(7,7,4);

for j = 1:100

 im = convn(data,X,'same');
 imagesc(dot(im,im,3))
 title(num2str(j))
 drawnow

end
%------------------------------------------------

The only other clue I have is that is only happens with complex variables
(data, X).




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