wx listctrl assertion when activating child

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What steps will reproduce the problem?
1. Open rad2py, load a file to debug (i.e. wslpg.py)
2. Debug step-by-step from any module import
3. When returning to main file, exception will raise

What is the expected output? What do you see instead?

Traceback (most recent call last):
  File "main.py", line 826, in GotoFileLine
    child = self.DoOpen(filename)
  File "main.py", line 682, in DoOpen
    child.Activate()
  File "/usr/local/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/lib/agw/aui/tabmdi.py", line 444, in Activate
    pClientWindow.SetSelection(pos)
  File "/usr/local/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/lib/agw/aui/tabmdi.py", line 609, in SetSelection
    return auibook.AuiNotebook.SetSelection(self, nPage)
  File "/usr/local/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/lib/agw/aui/auibook.py", line 4165, in SetSelection
    self.DoSizing()
  File "/usr/local/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/lib/agw/aui/auibook.py", line 4296, in DoSizing
    tabframe.DoSizing()
  File "/usr/local/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/lib/agw/aui/auibook.py", line 2759, in DoSizing
    self._tabs.Update()
  File "/usr/local/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_core.py", line 10699, in Update
    return _core_.Window_Update(*args, **kwargs)
PyAssertionError: C++ assertion "Assert failure" failed at 
../src/generic/listctrl.cpp(872) in DrawTextFormatted(): unknown list item 
format

Original issue reported on code.google.com by reingart@gmail.com on 20 Jun 2014 at 4:33