Description of problem:
I ran dnf builddep loudmouth

Version-Release number of selected component:
dnf-1.1.3-1.fc22

Additional info:
reporter:       libreport-2.6.3
cmdline:        /usr/bin/python -OO /bin/dnf builddep loudmouth
executable:     /bin/dnf
kernel:         4.2.3-200.fc22.x86_64
runlevel:       N 5
type:           Python
uid:            0

Truncated backtrace:
lib.py:170:package_source_name:AttributeError: 'NoneType' object has no attribute 'rstrip'

Traceback (most recent call last):
  File "/bin/dnf", line 36, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 198, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 84, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 136, in _main
    cli.run()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 1091, in run
    return self.command.run(self.base.extcmds)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/builddep.py", line 76, in inner
    return func(*args, **kwds)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/builddep.py", line 142, in run
    self._remote_deps(pkgspec)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/builddep.py", line 213, in _remote_deps
    package).get_best_query(self.base.sack)})
  File "/usr/lib/python2.7/site-packages/dnf-plugins/builddep.py", line 212, in <setcomp>
    for pkg in dnf.subject.Subject(
  File "/usr/lib/python2.7/site-packages/dnfpluginscore/lib.py", line 170, in package_source_name
    srcname = package.sourcerpm.rstrip(".src.rpm")
AttributeError: 'NoneType' object has no attribute 'rstrip'

Local variables in innermost frame:
package: <hawkey.Package object id 81381, loudmouth-1.4.3-15.fc22.src, fedora-source>

Potential duplicate: bug 1272936