[Octave-bug-tracker] [bug #65605] Octave call to function figure(); results in segfault with Qt6 6.7.0

[Markus Mützel]

Update of bug #65605 (group octave):

        Operating System:               GNU/Linux => Any                    

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Follow-up Comment #15:

Thanks for the backtrace from a different platform.

That very much looks like the same issue as on Windows with Qt6 6.7.0.
For some reason, `QOpenGLContext::currentContext()` returns a nullptr. And
dereferencing it causes the segmentation fault. Afaict, that is happening
here:
https://github.com/qt/qtbase/blob/488545ca72b7f2a59401a42c2c264f38916e15d1/src/openglwidgets/qopenglwidget.cpp#L996

I don't know *why* that is happening though. Should Octave have initialized an
OpenGL context before that? Or is that something that Qt6 should have done
automagically or failed to do? Or something else?

CC'ing Pantxo and Torsten in case they have an idea what might be happening
here.


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