Your package cantor failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17691927 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1251042 [details] build.log
Created attachment 1251043 [details] root.log
Created attachment 1251044 [details] state.log
%changelog +* Mon Feb 20 2017 Rex Dieter <rdieter> - 16.12.2-3 +- cantor: FTBFS in rawhide (#1423091)