It's crashing before the call to g_type_check_instance_is_a. The stack trace in
https://lists.gnucash.org/pipermail/gnucash-user/2023-November/109345.html
points to offset 1374 in gnc_plugin_page_report_focus_widget. Here's the
disassembly:
tub for: gnc_window_set_progressbar_window
This seems to point at a regression in Gtk.
>From what I understand GTK_IS_WIDGET should return FALSE if widget is NULL.
It's defined here:
https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtkwidget.h?
ref_type=heads#L46
It's a macro that calls G_TYPE_CHECK_INSTANCE_TYPE, which is defined
