[Bug 896836] Re: Segmentation fault when asking help() for the list of modules

[Jonathan Heeth]

As someone in a prior bug-report discovered that uncommenting line 27 in dist-packages/gobject/constants.py cures the crash.
Actually that line makes no sense as a python statement, but just listing the variable name TYPE_INVALID, without assigning any value in constants.py (which the comment there states is defined in gobjectmodule.c) eliminates the crash.

This would seem to discredit the theory that simultaneous loading of
static and dynamic bindings is to blame.

Does the variable NEED to be declared in the python even if it's value is assinge in a .c file in order to work ?
I'm not knowledgable about the inner workings of the python language.
Is this a valid fix?

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https://bugs.launchpad.net/bugs/896836

Title:
  Segmentation fault when asking help() for the list of modules

Status in PyGTK: GTK+ for Python:
  New
Status in “python2.7” package in Ubuntu:
  Confirmed

Bug description:
  Using Python 2.7.2 on Oneiric (package version is 2.7.2-7ubuntu2), I'm
  getting a consistent segmentation fault when I open the interactive
  help in a Python shell (i.e. typing "help()" in the shell) and then
  ask for the list of modules (by typing "modules").

  The error code returned is as follows:
  Please wait a moment while I gather a list of all available modules...

  /usr/lib/python2.7/dist-packages/gobject/constants.py:24: Warning: g_boxed_type_register_static: assertion `g_type_from_name (name) == 0' failed
    import gobject._gobject
  /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: g_boxed_type_register_static: assertion `g_type_from_name (name) == 0' failed
    from gtk import _gtk

  ** (python:5116): CRITICAL **: pyg_register_boxed: assertion `boxed_type != 0' failed
  /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: cannot register existing type `GdkDevice'
    from gtk import _gtk
  /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: g_type_get_qdata: assertion `node != NULL' failed
    from gtk import _gtk
  Segmentation fault

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