Your package synaptic failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17792617 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1254856 [details] build.log
Created attachment 1254857 [details] root.log
Created attachment 1254858 [details] state.log
This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle. Changing version to '26'.
I fixed this for rawhide: https://koji.fedoraproject.org/koji/buildinfo?buildID=989561 Fixes for RPM 4.13 support and compiling with GCC 6/7 were required. Do you want to merge these changes back into Fedora releases so that the fixes make their way to users there?
Fixes will release with Fedora 28.