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

--- mate-control-center/font-viewer/sushi-font-loader.c	2015-08-30 14:20:23.501739471 +0200

+++ mate-control-center-test/font-viewer/sushi-font-loader.c	2015-08-30 14:10:57.707855000 +0200

@@ -87,10 +87,13 @@ create_face_from_contents (FontLoadJob *

                                  &retval);

   if (ft_error != 0) {

-    g_set_error_literal (error, G_IO_ERROR, 0,

-                         "Unable to read the font face file");

+    gchar *uri;

+    uri = g_file_get_uri (job->file);

+    g_set_error (error, G_IO_ERROR, 0,

+                 "Unable to read the font face file '%s'", uri);

     retval = NULL;

     g_free (job->face_contents);

+    g_free (uri);

   } else {

     *contents = job->face_contents;

   }

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

--- mate-control-center/font-viewer/sushi-font-widget.c	2015-08-30 14:20:16.141662952 +0200

+++ mate-control-center-test/font-viewer/sushi-font-widget.c	2015-08-30 14:14:40.146169000 +0200

@@ -37,6 +37,7 @@ enum {

 enum {

   LOADED,

+  ERROR,

   NUM_SIGNALS

 };

@@ -549,7 +550,7 @@ font_face_async_ready_cb (GObject *objec

                                        &error);

   if (error != NULL) {

-    /* FIXME: need to signal the error */

+    g_signal_emit (self, signals[ERROR], 0, error->message);

     g_print ("Can't load the font face: %s\n", error->message);

     g_error_free (error);

@@ -682,6 +683,13 @@ sushi_font_widget_class_init (SushiFontW

                   0, NULL, NULL,

                   g_cclosure_marshal_VOID__VOID,

                   G_TYPE_NONE, 0);

+  signals[ERROR] =

+    g_signal_new ("error",

+                  G_TYPE_FROM_CLASS (klass),

+                  G_SIGNAL_RUN_FIRST,

+                  0, NULL, NULL,

+                  g_cclosure_marshal_VOID__STRING,

+                  G_TYPE_NONE, 1, G_TYPE_STRING);

   g_object_class_install_properties (oclass, NUM_PROPERTIES, properties);

   g_type_class_add_private (klass, sizeof (SushiFontWidgetPrivate));

@@ -705,3 +713,9 @@ sushi_font_widget_get_ft_face (SushiFont

   return self->priv->face;

 }

+const gchar *

+sushi_font_widget_get_uri (SushiFontWidget *self)

+{

+  return self->priv->uri;

+}

+

diff -upr mate-control-center/font-viewer/sushi-font-widget.h mate-control-center-test/font-viewer/sushi-font-widget.h

--- mate-control-center/font-viewer/sushi-font-widget.h	2015-08-30 14:20:07.806576294 +0200

+++ mate-control-center-test/font-viewer/sushi-font-widget.h	2015-08-30 14:15:23.586620000 +0200

@@ -63,6 +63,8 @@ SushiFontWidget *sushi_font_widget_new (

 FT_Face sushi_font_widget_get_ft_face (SushiFontWidget *self);

+const gchar *sushi_font_widget_get_uri (SushiFontWidget *self);

+

 G_END_DECLS

 #endif /* __SUSHI_FONT_WIDGET_H__ */