[Octave-bug-tracker] [bug #50189] Segfault when drawing sphere as first plot

[Pantxo Diribarne]

Follow-up Comment #15, bug #50189 (project octave):

@John: I am pretty sure labels have been hidden children of axes objects at
least up to ML2015b, just like in Octave. Could someone test the following in
Matlab?


%% Are labels children of the axes object
labels = {'xlabel', 'ylabel', 'zlabel', 'title'};
hlabels = cell2mat (get (gca, labels));
all (cell2mat (get (hlabels, 'parent')) == gca)


@Rik: when running "sphere (64)" from scratch, "do_reset" is false and the
axes object, which was just created, is untouched prior to plotting.

I think that the change in newplot only reveals a (up to now) potential race
condition. 
AFAICS, there are text_renderer objects instantiated as part of axes and text
objects (handled in the interpreter thread) and opengl_renderer objects (GUI
thread when using Qt). I also see there is a ft_manager: do those objects
share any sensible objects like FT_Face (see [1])?

[1]
https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#FT_Face

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