update-manager crashes when I click on the install now button

[Drole de zebre]

Hello!

Each time I click on the install now button, update-manager crashes. My config is:
Lubuntu 14.10 64 bits using Intel(R) Core(TM) i3-2120 CPU @ 3.30GHz and 4GB DIMM DDR3 Synchrone 1333 MHz (0,8 ns).

Here is the error message:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/defer/__init__.py", line 487, in _inline_callbacks
    result = gen.send(result)
  File "/usr/lib/python3/dist-packages/aptdaemon/client.py", line 1641, in _run_transaction_helper
    defer.return_value(trans)
  File "/usr/lib/python3/dist-packages/defer/__init__.py", line 462, in return_value
    raise _DefGen_Return(val)
defer._DefGen_Return: <AptTransaction object at 0x7f2018897990 (aptdaemon+client+AptTransaction at 0x1a4b760)>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/defer/__init__.py", line 487, in _inline_callbacks
    result = gen.send(result)
  File "/usr/lib/python3/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py", line 140, in _show_transaction
    expander = AptDetailsExpander(trans)
  File "/usr/lib/python3/dist-packages/aptdaemon/gtk3widgets.py", line 329, in __init__
    self.terminal = AptTerminal()
  File "/usr/lib/python3/dist-packages/aptdaemon/gtk3widgets.py", line 394, in __init__
    self.set_pty_object(Vte.Pty.new_foreign(self._master))
AttributeError: 'AptTerminal' object has no attribute 'set_pty_object'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/defer/__init__.py", line 487, in _inline_callbacks
    result = gen.send(result)
  File "/usr/lib/python3/dist-packages/aptdaemon/client.py", line 1641, in _run_transaction_helper
    defer.return_value(trans)
  File "/usr/lib/python3/dist-packages/defer/__init__.py", line 462, in return_value
    raise _DefGen_Return(val)
defer._DefGen_Return: <AptTransaction object at 0x7f2018897990 (aptdaemon+client+AptTransaction at 0x1a4b760)>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/defer/__init__.py", line 483, in _inline_callbacks
    result = gen.throw(excep)
  File "/usr/lib/python3/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py", line 92, in commit
    _("Installing updates…"), True)
  File "/usr/lib/python3/dist-packages/defer/__init__.py", line 487, in _inline_callbacks
    result = gen.send(result)
  File "/usr/lib/python3/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py", line 140, in _show_transaction
    expander = AptDetailsExpander(trans)
  File "/usr/lib/python3/dist-packages/aptdaemon/gtk3widgets.py", line 329, in __init__
    self.terminal = AptTerminal()
  File "/usr/lib/python3/dist-packages/aptdaemon/gtk3widgets.py", line 394, in __init__
    self.set_pty_object(Vte.Pty.new_foreign(self._master))
AttributeError: 'AptTerminal' object has no attribute 'set_pty_object'

Thank you in advance.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[nkeseci (necati-7)]

Hello!

I have been getting the same error after installed gnome3 instead of unity.

Release: 14.10 (upgraded to every release from 12.04 without any problem)

3.16.0-25-generic x86_64, i7-3720QM

Regards,