[Octave-bug-tracker] [bug #53802] octave deadlocks with deletefcn callback that calls graphical function

[Rik]

Update of bug #53802 (project octave):

                Priority:              5 - Normal => 3 - Low                

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Follow-up Comment #1:

Confirmed.  It probably isn't a very common occurrence so I lowered the
priority, but this should work.  I actually wrote a little m-file mydel.m for
testing


function mydel (h)
  keyboard;
  btn = questdlg ('Do you want to quit');
  if (strcmp (btn, 'Yes'))
    delete (h);
  endif
endfunction


I then used 


figure ('deletefcn', @mydel)


and finally closed the figure.

stepping through the code, the problem was the call to questdlg.

Incidentally, using the FLTK toolkit a dialog was correctly shown so this is
likely to be a cross-thread issue with Qt.


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