Sorting out a11y in Software-center I hit the following webkit error

[Dave Morley]

To reproduce:
1. open up orca
2. grab USC trunk
3. run usc against oneiric distro series
4. buy an application
5. tab through fields on the payment page
6. USC core dumps with the following error:
2012-01-27 15:08:23,379 - softwarecenter.db.application - WARNING - failed to import debtagshw
/usr/lib/python2.7/dist-packages/gi/types.py:43: Warning: g_object_unref: assertion `G_IS_OBJECT (object)' failed
  return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:43: Warning: invalid uninstantiatable type `(null)' in cast to `WebKitAccessible'
  return info.invoke(*args, **kwargs)
Segmentation fault (core dumped)

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: libwebkitgtk-3.0-0 1.7.4-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-10.18-generic 3.2.1
Uname: Linux 3.2.0-10-generic x86_64
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Fri Jan 27 15:35:51 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120117)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: webkit
UpgradeStatus: Upgraded to precise on 2012-01-19 (8 days ago)

[Dave Morley (davmor2)]

Full terminal output

davmor2@stryder:~/software-center$ ./software-center
2012-01-27 13:11:29,253 - softwarecenter - INFO - Using data (UI, xapian) from current dir
2012-01-27 13:11:29,487 - softwarecenter.ui.gtk3.em - INFO - EM's: 17 13 20
2012-01-27 13:11:29,848 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2012-01-27 13:11:29,918 - softwarecenter.ui.gtk3.utils - INFO - Softwarecenter style provider for ambiance Gtk theme: ./data/ui/gtk3/css/softwarecenter.css
2012-01-27 13:12:04,440 - softwarecenter.ui.gtk3.app - INFO - software-center-agent finished with status 0
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'load_range'
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'load_range'
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'load_range'
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'load_range'
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'load_range'
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'load_range'
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'load_range'
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'load_range'
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'load_range'
Traceback (most recent call last):
  File "/home/davmor2/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 466, in _cell_data_func_cb
    model.load_range(indices, 5)
AttributeError: 'TreeModelFilter' object has no attribute 'loa...

[Rick Spencer (rick-rickspencer3)]

Though the crasher appears to be in webkit, assigning to software center team in case they want to take a look at working around this crasher.