GLib-GObject-CRITICAL **: 13:21:53.256: Object 0x5485140 of type GimpLineArt not finalized correctly.
With a GLib-2.0 self built with -Dglib_debug=enabled, running gimp-2.99 having set GOBJECT_DEBUG=objects shows these two CRITICALs:
GLib-GObject-CRITICAL **: 13:21:53.256: Object 0x5485140 of type GimpLineArt not finalized correctly.
GLib-GObject-CRITICAL **: 13:21:57.472: Object 0x231f520 of type GimpExtension not finalized correctly.
meaning that GimpLineArt and GimpExtension finalize
functions do not chain up to their parent implementation