Bug on multiple inclusion for classes

[BuonOmo]

I'm trying to fix completion (in irb) for https://github.com/rgeo/rgeo. However, I stumbled upon an issue which once reduced to a minimal example seems to be a Rdoc bug:

# t.rb
module RGeo
  module Feature
    module Surface
      # YEAH YEAH YIPIYEAH YIPIYO
      def centroid
        puts "I can be executed"
      end
    end
  end
end

module RGeo
  module Feature
    module Polygon
      include Surface
    end
  end
end

module RGeo
  class Geos
    class CAPIPolygonImpl # changing that for `module Geos` works
      include Feature::Polygon
    end
  end
end

$ rdoc -q -f ri --op t t.rb
$ ri --no-standard-docs -d t RGeo::Geos::CAPIPolygonImpl#centroid
Nothing known about RGeo::Geos::CAPIPolygonImpl#centroid

The code is valid ruby (you never now ^^, ruby -r./t.rb -e 'RGeo::Geos::CAPIPolygonImpl.new.centroid'). And changing the class CAPIPolygonImpl to module CAPIPolygonImpl gives the expected output:

$ ri --no-pager --no-standard-docs -d t RGeo::Geos::CAPIPolygonImpl#centroid
RGeo::Geos::CAPIPolygonImpl#centroid

(from /Users/ulysse/Dev/rgeo/rgeo/t)
Implementation from Surface
------------------------------------------------------------------------
  centroid()

------------------------------------------------------------------------

YEAH YEAH YIPIYEAH YIPIYO

Do you have any hint on where it could come from?

Thank you 🙏

[Quiwin]

It seems to be an issue with ancestors_of

rdoc/lib/rdoc/ri/driver.rb

Line 612 in ebe185c

break unless stores and not stores.empty?

which break out of its loop if a class has no store associated to it.

When checking for associated store for the ancestor Object, no context is found because of --no-standard-docs and the loop break.