second nautilus spawns errors

[Aapo Rantalainen]

Ubuntu 16.04 LTS
nautilus:
 1:3.18.4.is.3.14.3-0ubuntu4

Steps to reproduce:
killall nautilus
nautilus /home &
nautilus /tmp

(nautilus:17416): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed
(nautilus:17416): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed
(nautilus:17416): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
(nautilus:17416): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(nautilus:17416): GLib-GObject-CRITICAL **: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

Same errors (but with different line numbers) are polluting also at least:
https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1576252
https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1571431
https://ask.fedoraproject.org/en/question/72155/nautilus-critical-error/

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.