[MacPorts] #58274: sane-backends and dbus problem after upgrade to macOS 10.14.4 (18E226)

[MacPorts]

#58274: sane-backends and dbus problem after upgrade to macOS 10.14.4 (18E226)
--------------------------------------+---------------------------
 Reporter:  Kyshman                   |      Owner:  (none)
     Type:  defect                    |     Status:  new
 Priority:  Normal                    |  Milestone:
Component:  ports                     |    Version:  2.5.4
 Keywords:  sane-backends dbus avahi  |       Port:  sane-backends
--------------------------------------+---------------------------
 After an upgrade to macOS 10.14.4 sane applications like xsane, scanimage
 are failing with a dbus error.

 > scanimage -L
 dbus[85732]: Dynamic session lookup supported but failed: launchd did not
 provide a socket path, verify that org.freedesktop.dbus-session.plist is
 loaded!
 Assertion failed: (p), function avahi_threaded_poll_lock, file thread-
 watch.c, line 171.
 fish: 'scanimage -L' terminated by signal SIGABRT (Abort)

 After setting up debug more information is provided.

 bash-3.2$ SANE_DEBUG_NET=3 scanimage -L
 [sanei_debug] Setting debug level of net to 3.
 [net] sane_init: authorize != null, version_code != null
 dbus[57747]: Dynamic session lookup supported but failed: launchd did not
 provide a socket path, verify that org.freedesktop.dbus-session.plist is
 loaded!
 [net] net_avahi_init: could not create Avahi client: Memory exhausted
 [net] net_avahi_init: Avahi init failed, support disabled
 [net] sane_init: SANE net backend version 1.0.14 (AF-indep+IPv6) from
 sane-backends 1.0.27
 [net] sane_init: Client has little endian byte order
 [net] sane_init: searching for config file
 [net] sane_init: done reading config
 [net] sane_init: evaluating environment variable SANE_NET_HOSTS
 [net] sane_init: evaluating environment variable SANE_NET_TIMEOUT
 [net] sane_init: done
 [net] sane_get_devices: local_only = 0
 [net] sane_get_devices: finished (0 devices)

 No scanners were identified. If you were expecting something different,
 check that the scanner is plugged in, turned on and detected by the
 sane-find-scanner tool (if appropriate). Please read the documentation
 which came with this software (README, FAQ, manpages).
 [net] sane_exit: exiting
 [net] sane_exit: finished.

 This setup was working on before the upgrade.

-- 
Ticket URL: <https://trac.macports.org/ticket/58274>
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