diff -upr mate-control-center/font-viewer/font-model.c mate-control-center-test/font-viewer/font-model.c
--- mate-control-center/font-viewer/font-model.c	2015-08-30 16:24:57.640773938 +0200
+++ mate-control-center-test/font-viewer/font-model.c	2015-08-30 16:17:02.562759000 +0200
@@ -542,7 +542,7 @@ get_fallback_icon (void)
         return NULL;
 
     pix = gtk_icon_info_load_icon (icon_info, NULL);
-    gtk_icon_info_free (icon_info);
+    g_object_unref (icon_info);
 
     return pix;
 }