Your package Singular failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=10076603 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
Created attachment 1046380 [details] build.log
Created attachment 1046381 [details] root.log
Created attachment 1046382 [details] state.log
This bug appears to have been reported against 'rawhide' during the Fedora 23 development cycle. Changing version to '23'. (As we did not run this process for some time, it could affect also pre-Fedora 23 development cycle bugs. We are very sorry. It will help us with cleanup during Fedora 23 End Of Life. Thank you.) More information and reason for this action is here: https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora23
Build fixed in rawhide, by temporarily disabling polymake dependency, due to it being broken and having a cyclic build dependency. Also corrected a minor problem in a perl script.