[packagekit] problem with yum2

[Richard Hughes]

$ pkcon --verbose get updatedetail "boost;1.34.1-7.fc8;i386;updates"

[hughsie at hughsie-laptop helpers]$ sudo ./yumDBUSBackend.py 
__init__
INFO:Init()
Now in doInit()
new yumbase object
yum set up
INFO:GetUpdateDetail()
INFO:AllowCancel (1)
__init__ done
DEBUG:PercentageChanged (101)
INFO:StatusChanged (info)
INFO:UpdateDetail (boost;1.34.1-7.fc8;i386;updates, boost;1.34.1-5.fc8;i386;installed, , , https://bugzilla.redhat.com/show_bug.cgi?id=428975;CVE-2008-0171 CVE-2008-0172 Multiple boost vulnerabilities [Fedora 8]
https://bugzilla.redhat.com/show_bug.cgi?id=428316;CVE-2008-0171 boost regular expression memory corruption flaws
https://bugzilla.redhat.com/show_bug.cgi?id=428320;CVE-2008-0172 boost regular expression NULL dereference flaw, , none, None)
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.5/threading.py", line 460, in __bootstrap
    self.run()
  File "/usr/lib/python2.5/threading.py", line 440, in run
    self.__target(*self.__args, **self.__kwargs)
  File "./yumDBUSBackend.py", line 1094, in doGetUpdateDetail
    self.UpdateDetail(package,update,obsolete,vendor_url,bz_url,cve_url,reboot,desc)
  File "/home/hughsie/Code/PackageKit/backends/yum2/helpers/packagekit/daemonBackend.py", line 111, in wrapper
    return func(*args,**kwargs)
  File "/usr/lib/python2.5/site-packages/dbus/decorators.py", line 289, in emit_signal
    message.append(signature=signature, *args)
TypeError: Expected a string or unicode object

Two problems:
* the traceback error
* the traceback wasn't propagated to the daemon as an ErrorCode() and
hence the daemon hung.

Richard.