[Bug 975292] Re: janitor wont run; ERROR:dbus.proxies:Introspect error on :1.65

[Pander]

On precise 12.04:

# computer-janitor find
ERROR:dbus.proxies:Introspect error on :1.94:/: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.AccessDenied: Rejected send message, 1 matched rules; type="method_call", sender=":1.104" (uid=0 pid=6716 comm="/usr/bin/python /usr/sbin/computer-janitor find ") interface="org.freedesktop.DBus.Introspectable" member="Introspect" error name="(unset)" requested_reply="0" destination=":1.94" (uid=0 pid=6507 comm="/usr/bin/python /usr/share/computerjanitor/janitor")

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Title:
  janitor wont run; ERROR:dbus.proxies:Introspect error on :1.65

Status in “computer-janitor” package in Ubuntu:
  Confirmed

Bug description:
  ERROR:dbus.proxies:Introspect error on :1.65:/: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.AccessDenied: Rejected send message, 1 matched rules; type="method_call", sender=":1.69" (uid=0 pid=2744 comm="/usr/bin/python /usr/sbin/computer-janitor clean -") interface="org.freedesktop.DBus.Introspectable" member="Introspect" error name="(unset)" requested_reply="0" destination=":1.65" (uid=0 pid=2647 comm="/usr/bin/python /usr/share/computerjanitor/janitor")
  ERROR:dbus.connection:Unable to set arguments ((),) according to signature None: <type 'exceptions.ValueError'>: D-Bus structs cannot be empty
  Traceback (most recent call last):
    File "/usr/sbin/computer-janitor", line 35, in <module>
      main()
    File "/usr/share/computerjanitor/computerjanitorapp/cli/main.py", line 312, in main
      options.arguments.func(options.arguments)
    File "/usr/share/computerjanitor/computerjanitorapp/cli/main.py", line 293, in clean
      timeout=3600)
    File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 135, in __call__
      **keywords)
    File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 566, in call_async
      message.append(signature=signature, *args)
  ValueError: D-Bus structs cannot be empty

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: computer-janitor 2.1.0-0ubuntu6
  ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13
  Uname: Linux 3.0.0-15-generic i686
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  CheckboxSubmission: 3f05f4c2ad33795bd2ea179065fdea51
  CheckboxSystem: efd05939b08abfe86caa44c3820f8e56
  Date: Fri Apr  6 17:25:54 2012
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
  PackageArchitecture: all
  SourcePackage: computer-janitor
  UpgradeStatus: No upgrade log present (probably fresh install)

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