Running up glade results in CRITICAL messages which are useless.
There is something wrong with my z80em.glade file, but the messages are no help at all:
minivac2:~/tmp$ glade z80em.glade
GladeUI-Message: 17:28:14.374: 1 missing displayable value for GtkWidget::events
GladeUI-Message: 17:28:14.374: 1 missing displayable value for GtkWidget::AtkObject::accessible-role
GladeUI-Message: 17:28:14.438: 2 missing displayable value for GtkEntry::input-hints
GladeUI-Message: 17:28:14.529: No displayable values for property GtkMenu::anchor-hints
GladeUI-Message: 17:28:14.562: 2 missing displayable value for GtkAboutDialog::license-type
GladeUI-Message: 17:28:14.632: 1 missing displayable value for GtkCellRendererAccel::accel-mode
GladeUI-Message: 17:28:14.683: No displayable values for property WebKitWebView::automation-prese
ntation-type
GladeUI-Message: 17:28:14.689: No displayable values for property WebKitSettings::hardware-acceleration-policy
GladeUI-Message: 17:28:14.690: Glade needs artwork; a default icon will be used for the following classes:
WebKitSettings needs an icon named 'widget-webkit2gtk-settings'
WebKitWebView needs an icon named 'widget-webkit2gtk-webview'
GtkApplicationWindow needs an icon named 'widget-gtk-applicationwindow'
GThemedIcon needs an icon named 'widget-gtk-themedicon'
(glade:11922): GladeUI-GTK-CRITICAL **: 17:28:15.089: Cant add more than one widget to a GtkWindow
(glade:11922): GladeUI-GTK-CRITICAL **: 17:28:15.109: Cant add more than one widget to a GtkWindow
Gtk-Message: 17:28:15.187: GtkDialog mapped without a transient parent. This is discouraged.
Gtk-Message: 17:28:15.221: GtkDialog mapped without a transient parent. This is discouraged.`
At least they should provide some indication of where in the glade file the error is occurring. The timestamp doesn't give any useful information. Also, giving the missing displayable item would be useful.