python-pexpect-debuginfo-2.5.1-11.fc21.x86_64 is empty. As long as the package needs to be noarch and there's nothing to create -debuginfo from, the subpackage should be explicitly disabled.
s/needs to be noarch/needs to be non-noarch/
This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle. Changing version to '22'. More information and reason for this action is here: https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora22
it's actually noarch now.