unity-tweak-tool crashed with AttributeError in on_craccel_compiz_windows_spread_accel_cleared(): 'NoneType' object has no attribute 'get_iter'

[Jason Warner]

Was testing out several options and got this crash. Not sure which exact option caused it, unfortunately.

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: unity-tweak-tool 0.0.6
ProcVersionSignature: Ubuntu 3.13.0-7.26-generic 3.13.1
Uname: Linux 3.13.0-7-generic x86_64
ApportVersion: 2.13.2-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Feb 7 15:50:41 2014
ExecutablePath: /usr/bin/unity-tweak-tool
InstallationDate: Installed on 2012-11-06 (458 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
InterpreterPath: /usr/bin/python3.3
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/unity-tweak-tool
PythonArgs: ['/usr/bin/unity-tweak-tool']
SourcePackage: unity-tweak-tool
Title: unity-tweak-tool crashed with AttributeError in on_craccel_compiz_windows_spread_accel_cleared(): 'NoneType' object has no attribute 'get_iter'
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/python3/dist-packages/UnityTweakTool/section/spaghetti/compiz.py", line 737, in on_craccel_compiz_windows_spread_accel_cleared
     titer = model.get_iter(path)
 AttributeError: 'NoneType' object has no attribute 'get_iter'
UpgradeStatus: Upgraded to trusty on 2014-01-07 (30 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[JC (joostw)]

I was sent here via apport after a crash of unity tweak when I deleted (with pressing backspace) a preiously set keyboard shortcut for window spread. This happened to me a couple of times already.

[Launchpad Janitor (janitor)]

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

[JC (joostw)]

Seems pretty consistent, crashes every time for me.