Your package guacamole-client failed to build from source in current rawhide.
For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 905170 [details]
Created attachment 905171 [details]
Created attachment 905172 [details]
Fixed in guacamole-client-0.9.1-2
I believe that this bug is fixed in guacamole-client-0.9.1-2,
which is available in Fedora Rawhide, so I am closing this bug now.
The build containing the fix can be found at Koji: