[Octave-bug-tracker] [bug #54187] fail to close a busy figure and crash octave

[anonymous]

Follow-up Comment #6, bug #54187 (project octave):

It seems that in Octave 4.4.0 graphics_toolkit qt, there might be something
wrong with the menu "File > Close Figure  Ctrl+W" (or the window "x" button).

If I run

figure();
while 1
  drawnow(); pause(0.1);
end


in Octave 4.2.x, everything works well; all the menus can response in time.

But in Octave 4.4.0, everything works well (e.g. "File > Save", "Help > About
Octave", as well as user-defined menus) 
except for the "File > Close Figure" —— not only it cannot close the
figure in time, but also it may crash Octave with Segfault later.

A workaround in 4.4.0 is to add a user-defined menu, such as

h = uimenu('label', 'My File' );
uimenu(h, 'label', 'My Close', 'callback', 'close');

while 1
  drawnow(); pause(0.1);
end


The additional menu "My File > My Close" works well; it can close the figure
in time.
But, again, we must NOT click the original menu "File > Close Figure" which
doesn't work and may crash Octave.

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