diff -upr mate-control-center/font-viewer/font-view.c mate-control-center-test/font-viewer/font-view.c

--- mate-control-center/font-viewer/font-view.c	2015-08-30 13:15:18.316251829 +0200

+++ mate-control-center-test/font-viewer/font-view.c	2015-08-30 13:10:16.766144000 +0200

@@ -386,6 +386,35 @@ back_button_clicked_cb (GtkButton *butto

 }

 static void

+font_view_show_font_error (FontViewApplication *self,

+                           const gchar *message)

+{

+    GtkWidget *dialog;

+

+    dialog = gtk_message_dialog_new (GTK_WINDOW (self->main_window),

+                                     GTK_DIALOG_MODAL,

+                                     GTK_MESSAGE_ERROR,

+                                     GTK_BUTTONS_CLOSE,

+                                     _("This font could not be displayed."));

+    gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),

+                                              "%s",

+                                              message);

+    g_signal_connect (dialog, "response", G_CALLBACK (gtk_widget_destroy), NULL);

+    gtk_widget_show (dialog);

+}

+

+static void

+font_widget_error_cb (SushiFontWidget *font_widget,

+                      const gchar *message,

+                      gpointer user_data)

+{

+    FontViewApplication *self = user_data;

+

+    font_view_application_do_overview (self);

+    font_view_show_font_error (self, message);

+}

+

+static void

 font_widget_loaded_cb (SushiFontWidget *font_widget,

                        gpointer user_data)

 {

@@ -480,6 +509,8 @@ font_view_application_do_open (FontViewA

         g_signal_connect (self->font_widget, "loaded",

                           G_CALLBACK (font_widget_loaded_cb), self);

+        g_signal_connect (self->font_widget, "error",

+                          G_CALLBACK (font_widget_error_cb), self);

     } else {

         g_object_set (self->font_widget, "uri", uri, NULL);

     }