Your package gazebo failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17715944 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1252152 [details] build.log
Created attachment 1252153 [details] root.log
Created attachment 1252154 [details] state.log
This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle. Changing version to '26'.
rmattes's gazebo-8.0.0-1.fc27 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=875333