[Octave-bug-tracker] [bug #31931] figure (1, "visible", "off") -> Bus error

[Søren Hauberg]

Follow-up Comment #16, bug #31931 (project octave):

I am seeing similar behaviour (as noted in bug #32165). For me the crash
happens in line 136 in fltk_backend.cc

  glMatrixMode (GL_PROJECTION);

A bit of Google'ing tells me that this usually happens if the frame buffer is
not initialised. I tried seeing if I could call glCheckFrameBufferStatus to
determine this, but I never managed to persuade the compiler that such a
function exists :-(

Is it possible that when we don't have a plot to show, we don't have a frame
buffer either?

Søren

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