Description of problem: Since I have submitted updated rubygem-treetop into the Rawhide, it should be possible to remove the patch which is relaxing the polyglot dependency. If I get the commit bits for F15, it will be possible to remove it also there. Conditional patching might be solution to keep the spec in sync.
Ups s/rubygem-treetop/rubygem-polyglot/
I have submitted update for F15 already: https://admin.fedoraproject.org/updates/rubygem-polyglot-0.3.1-1.fc15 BTW it seems that the patch is causing FTBFS ...
I have just fixed the FTBFS for rubygem-treetop 716045, so I think everything is fixed here. I did remove that patch before I remembered this bug existed as well.