Block calls to g_object_get_data and friends
g_object_get_data()
and similar APIs can't be used in GJS as they deal with bare pointers. I heard on Matrix that they crash when used. PyGObject has a nice override for this, which GJS should copy: https://gitlab.gnome.org/GNOME/pygobject/-/blob/master/gi/overrides/GObject.py#L501-513