Your package libreswan failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17734275 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1252963 [details] build.log
Created attachment 1252964 [details] root.log
Created attachment 1252965 [details] state.log
This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle. Changing version to '26'.
pwouters's libreswan-3.20-0.1.dr4.fc27 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=864177
pwouters's libreswan-3.20-1.fc27 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=868977
pwouters's libreswan-3.21-1.fc27 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=953645