Your package synaptic failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=10156527 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
Created attachment 1048456 [details] build.log
Created attachment 1048457 [details] root.log
Created attachment 1048458 [details] state.log
Created attachment 1049183 [details] Fix for -Werror=format-security Instead would you consider to apply the attached patch?