[Bug 1055055] Re: [Ubuntu Quantal]Update-manager cannot be opened

[Barry Warsaw]

*** This bug is a duplicate of bug 1058884 ***
    https://bugs.launchpad.net/bugs/1058884

** This bug is no longer a duplicate of bug 1029683
   import causes EOFError: EOF read where not expected
** This bug has been marked a duplicate of bug 1058884
   Race condition in py_compile corrupts pyc files

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https://bugs.launchpad.net/bugs/1055055

Title:
  [Ubuntu Quantal]Update-manager cannot be opened

Status in “aptdaemon” package in Ubuntu:
  Confirmed
Status in “update-manager” package in Ubuntu:
  Confirmed

Bug description:
  I just upgraded ubuntu to quantal and i cannot open update-manager.
  this is what i get with a terminal:

  Traceback (most recent call last):
    File "/usr/bin/update-manager", line 115, in <module>
      app.start_update()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 164, in start_update
      self._start_pane(UpdateProgress(self))
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateProgress.py", line 56, in __init__
      self.install_backend = get_backend(self.datadir, self.window_main)
    File "/usr/lib/python3/dist-packages/UpdateManager/backend/__init__.py", line 51, in get_backend
      from .InstallBackendAptdaemon import InstallBackendAptdaemon
    File "/usr/lib/python3/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py", line 11, in <module>
      from aptdaemon import client, errors
  EOFError: EOF read where not expected

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