236cb01622
With the introduction of SetDisplay() method in4885d7490bthe Display property emits a "properties changed" message every time the display is changed using this method, so mark it appropriately. Caught by systemd/systemd#30029: systemd-logind[1366]: Got message type=method_call sender=:1.165 destination=org.freedesktop.login1 path=/org/freedesktop/login1/session/_310 interface=org.freedesktop.login1.Session member=SetDisplay cookie=8 reply_cookie=0 signature=s error-name=n/a error-message=n/a systemd-logind[1366]: Assertion 'v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE || v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION' failed at src/libsystemd/sd-bus/bus-objects.c:2141, function emit_properties_changed_on_interface(). Ignoring. Follow-up to4885d7490b.
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