Exception upgrading ubuntu-drivers-common

[Steve Magoun]

I got the following exception from a dist-upgrade of ubuntu-drivers-common:

Unpacking ubuntu-drivers-common (1:0.2.89.6) over (1:0.2.89.5) ...
[...]
Setting up ubuntu-drivers-common (1:0.2.89.6) ...
Exception ignored in: <bound method Popen.__del__ of <subprocess.Popen object at 0x7f392445d080>>
Traceback (most recent call last):
  File "/usr/lib/python3.4/subprocess.py", line 897, in __del__
TypeError: 'NoneType' object is not callable

Despite that, apt reports the installation completed successfully.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-drivers-common 1:0.2.89.6
ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5
Uname: Linux 3.13.0-16-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Mar 9 16:00:20 2014
InstallationDate: Installed on 2010-09-17 (1269 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
SourcePackage: ubuntu-drivers-common
UpgradeStatus: Upgraded to trusty on 2013-12-13 (86 days ago)

[Launchpad Janitor (janitor)]

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