$ xfdesktop
process 8890: D-Bus library appears to be incorrectly set up; failed to read machine uuid: Failed to open "/var/lib/dbus/machine-id": No such file or directory
See the manual page for dbus-uuidgen to correct this issue.

** (xfdesktop:8890): CRITICAL **: xfdesktop_icon_peek_label: assertion `XFDESKTOP_IS_ICON(icon)' failed

** (xfdesktop:8890): CRITICAL **: xfdesktop_icon_set_position: assertion `XFDESKTOP_IS_ICON(icon)' failed

(xfdesktop:8890): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(xfdesktop:8890): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(xfdesktop:8890): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(xfdesktop:8890): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(xfdesktop:8890): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(xfdesktop:8890): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

** (xfdesktop:8890): CRITICAL **: xfdesktop_icon_view_add_item: assertion `XFDESKTOP_IS_ICON_VIEW(icon_view) && XFDESKTOP_IS_ICON(icon)' failed