Your package iperf failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=12824493 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild
Created attachment 1124987 [details] build.log
Created attachment 1124988 [details] root.log
Created attachment 1124989 [details] state.log
This bug appears to have been reported against 'rawhide' during the Fedora 24 development cycle. Changing version to '24'. More information and reason for this action is here: https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora24#Rawhide_Rebase
somlo's iperf-2.0.8-4.fc25 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=745655
somlo's iperf-2.0.8-6.fc25 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=745774
iperf-2.0.8-6.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2016-9f815dce6b
iperf-2.0.8-6.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-9f815dce6b
iperf-2.0.8-6.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.