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QEMU aborts when default RAM backend should be used (i.e. no explicit '-machine memory-backend=' specified) but user has created an object which 'id' equals to default RAM backend name used by board. $QEMU -machine pc \ -object memory-backend-ram,id=pc.ram,size=4294967296 Actual results: QEMU 7.2.0 monitor - type 'help' for more information (qemu) Unexpected error in object_property_try_add() at ../qom/object.c:1239: qemu-kvm: attempt to add duplicate property 'pc.ram' to object (type 'container') Aborted (core dumped) Instead of abort, check for the conflicting 'id' and exit with an error, suggesting how to remedy the issue. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2207886 Signed-off-by: Igor Mammedov <imammedo@redhat.com> Message-Id: <20230522131717.3780533-1-imammedo@redhat.com> Tested-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Shaoqin Huang <shahuang@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Thomas Huth <thuth@redhat.com> (cherry picked from commit a37531f2381c4e294e48b1417089474128388b44) Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>