Your package rb_libtorrent failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17789027 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1254017 [details] build.log
Created attachment 1254018 [details] root.log
Created attachment 1254019 [details] state.log
See Bug 1421784 I've started a new build with a patch that should fix it.
jwakely's rb_libtorrent-1.1.1-4.fc26 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=855962