@provides directive doesn't work with interfaces (@apollo/federation)

[vitramir]

It throws with error " -> uses the @provides directive but <FIELD> returns <INTERFACE_TYPE>, which is not an Object or List type."

Does anybody work on this issue already? Or should I fix it myself?

Important notice:
It works as expected if I just comment throw line.

[cpeacock]

Hi there! We believe this is fixed in our Federation 2 alpha release, but feel free to reopen against that set of branches if the larger issue isn't fixed.