[GtkGLExt] The GtkDrawingArea ignores size reallocation when used with GtkGlExt



I use the basic example:
https://live.gnome.org/Vala/OpenGLSamples#Using_GtkGLExt:_Coloured_Triangle
And for some reason, when I resize the top-level window, allocation of the drawing area never get changed.
It should be, since on_configure_event () method is connected to configure-event signal.
I also tried to connect it with size-allocation signal and it didn't response too.
However, when trying Gtk with GLX, the drawing area allocation get changed:
https://live.gnome.org/Vala/OpenGLSamples#Using_GLX:_Coloured_Triangle
I use version 1.x, not the Gtk 3 development.

Is that a known bug or it's just me?


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