apt-listchanges crashed with NameError in cb_close(): global name 'sys' is not defined

[Austin S. Hemmelgarn]

Occured when closing apt-listchanges window.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: apt-listchanges 2.85.8ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
CheckboxSubmission: 6ea9c3faf783eabec9138661028dfdde
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
Date: Tue Aug 7 08:58:56 2012
ExecutablePath: /usr/bin/apt-listchanges
InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/apt-listchanges --apt
PythonArgs: ['/usr/bin/apt-listchanges', '--apt']
SourcePackage: apt-listchanges
Title: apt-listchanges crashed with NameError in cb_close(): global name 'sys' is not defined
Traceback:
 Traceback (most recent call last):
   File "/usr/share/apt-listchanges/AptListChangesGtk.py", line 25, in cb_close
     sys.exit()
 NameError: global name 'sys' is not defined
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: pkcs11

[Luke Faraone (lfaraone)]

For me, this bug occurs if I close the window before apt-listchanges finishes loading changelogs. The end state is that the apt upgrade process is hung.

[Launchpad Janitor (janitor)]

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