Re: Octave 4.0.1 CTRL-C questions

[Jeffrey Tsang]

Here's a simple script that crashes Octave GUI all the time.

clear; close all; clc

x = [1; 2; 3; 4];

y = x;

plot(x, y, 'rx', 'MarkerSize', 10);

fprintf('Program paused. Press enter to continue.\n');

pause;

The steps to reproduce is:

1. cd the to directory that contains the script.
2. Run the script.
3. When you see "Program paused. Press enter to continue", press CTRL-C twice. 
4. Now, you should see "Press Control-C again to abort.".
5. Press CTRL-C again. Then Octave GUI crashes.

However, this simple script does not crash Octave CLI. But my other complex scripts crash both CLI and GUI all the time. In fact, it was the octave-gui.exe that crashes when CTRL-C is pressed inside both CLI and GUI. I hope that gives you some clue where to look for the bug.

Regards,

Jeffrey

---

From: Tatsuro MATSUOKA <address@hidden>
To: Nicholas Jankowski <address@hidden>; Jeffrey Tsang <address@hidden>
Cc: address@hidden
Sent: Wednesday, May 25, 2016 2:35 AM
Subject: Re: Octave 4.0.1 CTRL-C questions

----- Original Message -----

> From: Nicholas Jankowski 
> To: Jeffrey Tsang 
> Cc: "address@hidden" 
> Date: 2016/5/24, Tue 22:36
> Subject: Re: Octave 4.0.1 CTRL-C questions
>
> On Tue, May 24, 2016 at 12:21 AM, Jeffrey Tsang <address@hidden>
> wrote:
>>
>>  How do I  stop the script without crashing Octave GUI?
>
> I believe there is an open bug report related to this issue:
>
> Ctrl+C after pause gives crash/segfault on Windows
> http://savannah.gnu.org/bugs/?44470
>
> There is some discussion there about the problem. I don't think it'll
> help you much, but maybe give a little insight into what's going on.
> If you have useful details to contribute to solving the issue, please
> do so. I noticed that a number of people mention difficulty recreating
> the issue, or the problem being intermittent, so if you can provide a
> 'these steps make it happen every time' example, it could be useful.
>


We might be back to old implementations for CTRL+C handler for windows before 
octave GUI had come.

I will move to bug tracker that Nicholas indicated.

http://savannah.gnu.org/bugs/?44470

Tatsuro