[Geany-Devel] Geany spews Gtk-CRITICAL messages on cursor movement

[Austin Green]

Recently built (on Xubuntu system) Geany from source.
Version: geany 1.39 (git >= d031d6f2) (built on 2021-12-14 with GTK 3.24.30, GLib 2.68.4)

Sometimes it emits hundreds of error messages of this general type:
(geany:7480): Gtk-CRITICAL **: 15:34:29.314: gtk_widget_hide: assertion 'GTK_IS_WIDGET (widget)' failed
(geany:7480): Gtk-CRITICAL **: 15:35:50.156: gtk_widget_get_visible: assertion 'GTK_IS_WIDGET (widget)' failed
(geany:7480): Gtk-CRITICAL **: 15:35:50.156: gtk_window_set_transient_for: assertion 'GTK_IS_WINDOW (window)' failed
whenever the cursor is moved around over the Geany window (even if it's hidden below another window). It seems to be happening on the first start of Geany after I ssh to the system.  If I start up another instance, it behaves fine.

Is it possible to build Geany so that it will emit more debug info, so I can have a go at tracking down this problem? Unless, of course, someone knows what the bug is already!   :)