Bug#613394: [CRASH] Uncaught exception AttributeError in Backend/PythonApt.py:801

[Thomas Richter]

Package: update-manager-core
Version: 0.200.5-1
File: /usr/share/pyshared/UpdateManager/Backend/PythonApt.py
Severity: normal

*** Please type your report below this line ***
update-manager crashed while upgrading sawfish and sawfish-data.


*** /tmp/update-manager-bugAVihg9
The information below has been automatically generated.
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- Exception Type: <type 'exceptions.AttributeError'>
- Exception Value: AttributeError("'NoneType' object has no attribute
'get_package_list'",)
- Exception Origin: <BugHandler.Thread(PythonAptCommit, started
140023515084544)>
- Exception Traceback:
   File "/usr/lib/pymodules/python2.6/UpdateManager/BugHandler.py", line 
89, in
run
     threading.Thread.run(self, *args, **kwargs)
   File "/usr/lib/python2.6/threading.py", line 484, in run
     self.__target(*self.__args, **self.__kwargs)
   File 
"/usr/lib/pymodules/python2.6/UpdateManager/Backend/PythonApt.py", line
801, in thread_helper
     for pkg_info in self._available_updates.get_package_list():