DS 1.2 introduces the updated attribute to the service reference to call a method if a bound service has been updated. The specification mandates to fail descriptor validation if the updated method is declared on a DS 1.0 or DS 1.1 descriptor.
The implementation currently just logs a warn level message and otherwise accepts the declaration. This must be modified to fail validation.
NB: A component declared for DS 1.1-felix also accepts the updated declaration since we introduced that functionality with