I'm not sure about this change. I've seen the failure but I think that the test should be fixed instead, see:
https://github.com/hughsie/oars/issues/18

@mak , what do you think?

In R419:0948aa29b5e4f310e592aed677ac31e110817b5c#3706026, @ltoscano wrote:

I'm not sure about this change. I've seen the failure but I think that the test should be fixed instead, see:
https://github.com/hughsie/oars/issues/18

@mak , what do you think?

Heh... Why this <strange> feature was approved at all? Anybody expects sex and violence from Rubik's cube game? Why this was not added to "violent" Bomber, Granatier or Killbots rather than Kubrick?

@ltoscano (I've replied to the Github issue as well):

Having an empty content_rating tag was not originally intended by the AppStream specification, so OARS changing that without changing the spec first or notifying about the change wasn't so awesome.
However, the validator has been adjusted meanwhile, so appstreamcli will now consider empty content_rating tags to be valid.
Update to AppStream >= 0.12.3 to get the change.