ec6bda56cbca9509b1abde1122645630caca877c
The alternative would be to treat gvariant and !gvariant messages differently. But this is a problem because we check signatures is variuos places before we have an actual message, for example in sd_bus_add_object_vtable(). It seems better to treat things consistent (i.e. follow the lowest common denominator) and disallow empty structures everywhere.
systemd - System and Service Manager
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