Crash when d'n'd task to make it a subtask

[Tomasz Melcer]

1- Take the default task set.
2- DnD "learn how to use plugins" on "learn how to use subtasks". No crash
3- DnD "learn how to use the workview" on "reporting bugs". Crash.

****************

Traceback (most recent call last):
  File "/home/liori/Studia/Projekty/gtg/gtg/GTG/taskbrowser/tasktree.py", line 370, in _celldatafunction
    value = model.get_value(iter, COL_TAGS)
  File "/usr/lib/python2.5/warnings.py", line 62, in warn
    globals)
  File "/usr/lib/python2.5/warnings.py", line 83, in warn_explicit
    for item in filters:
TypeError: unknown type (null)

I tried to move a single task which didn't have any parent to become a subtask of another task. Only the task list window was opened at the time.

[Tomasz Melcer (liori)]

It seems that it happens only when the target task is already a subtask (in other words: the dragged task will have a grandparent).

Also, after restarting GTG the change is done.

[Luca Invernizzi (invernizzi)]

Not sure if it's a regression, but it probably is, so I'm marking it

[Lionel Dricot (ploum-deactivatedaccount)]

Cannot reproduce it in trunk. Is this fixed ?

[Tomasz Melcer (liori)]

Well, I cannot tell. Trunk does not start properly for me now, so I cannot even test this problem.

[Tomasz Melcer (liori)]

Actually I can: `gtg` throws it currently during startup three times. I attached the output in https://bugs.edge.launchpad.net/gtg/+bug/589371.

[Lionel Dricot (ploum-deactivatedaccount)]

Still cannot reproduce that. Luca, have you a usecase ?

[Luca Invernizzi (invernizzi)]

I do.
1- Take the default task set.
2- DnD "learn how to use plugins" on "learn how to use subtasks". No crash
3- DnD "learn how to use the workview" on "reporting bugs". Crash.

Trace:

/home/luca/Projects/gtg/TRUNK/GTG/viewmanager/manager.py:207: GtkWarning: /build/buildd/gtk+2.0-2.20.1/gtk/gtktreeview.c:6015 (validate_visible_area): assertion `has_child' failed.
There is a disparity between the internal view of the GtkTreeView,
and the GtkTreeModel. This generally means that the model has changed
without letting the view know. Any display from now on is likely to
be incorrect.

  gtk.main()
/home/luca/Projects/gtg/TRUNK/GTG/viewmanager/manager.py:207: GtkWarning: gtk_tree_model_sort_get_value: assertion `VALID_ITER (iter, tree_model_sort)' failed
  gtk.main()
/home/luca/Projects/gtg/TRUNK/GTG/viewmanager/manager.py:207: Warning: g_object_set_property: assertion `G_IS_VALUE (value)' failed
  gtk.main()
/home/luca/Projects/gtg/TRUNK/GTG/viewmanager/manager.py:207: Warning: g_value_unset: assertion `G_IS_VALUE (value)' failed
  gtk.main()
/home/luca/Projects/gtg/TRUNK/GTG/taskbrowser/tasktree.py:377: GtkWarning: gtk_tree_model_sort_get_value: assertion `VALID_ITER (iter, tree_model_sort)' failed
  value = model.get_value(iter, COL_TAGS)
Traceback (most recent call last):
  File "/home/luca/Projects/gtg/TRUNK/GTG/taskbrowser/tasktree.py", line 377, in _celldatafunction
    value = model.get_value(iter, COL_TAGS)
TypeError: unknown type (null)

/home/luca/Projects/gtg/TRUNK/GTG/tools/gtkcrashhandler.py:231: GtkWarning: /build/buildd/gtk+2.0-2.20.1/gtk/gtktreeview.c:6015 (validate_visible_area): assertion `has_child' failed.
There is a disparity between the internal view of the GtkTreeView,
and the GtkTreeModel. This generally means that the model has changed
without letting the view know. Any display from now on is likely to
be incorrect.

  res = dialog.run()
/home/luca/Projects/gtg/TRUNK/GTG/tools/gtkcrashhandler.py:231: GtkWarning: /build/buildd/gtk+2.0-2.20.1/gtk/gtktreeview.c:4957 (gtk_tree_view_bin_expose): assertion `has_child' failed.
There is a disparity between the internal view of the GtkTreeView,
and the GtkTreeModel. This generally means that the model has changed
without letting the view know. Any display from now on is likely to
be incorrect.

  res = dialog.run()
/home/luca/Projects/gtg/TRUNK/GTG/tools/gtkcrashhandler.py:231: GtkWarning: gtk_tree_model_sort_get_value: assertion `VALID_ITER (iter, tree_model_sort)' failed
  res = dialog.run()
/home/luca/Projects/gtg/TRUNK/GTG/tools/gtkcrashhandler.py:231: Warning: g_object_set_property: assertion `G_IS_VALUE (value)' failed
  res = dialog.run()
/home/luca/Projects/gtg/TRUNK/GTG/tools/gtkcrashhandler.py:231: Warning: g_value_unset: assertion `G_IS_VALUE (value)' failed
  res = dialog.run()
Traceback (most recent call last):
  File "/home/luca/Projects/gtg/TRUNK/GTG/taskbrowser/tasktree.py", line 377, in _celldatafunction
    value = model.get_value(iter, COL_TAGS)
TypeError: unknown type (null)

[Lionel Dricot (ploum-deactivatedaccount)]

This is driving me crazy. I don't understand at all what's the root cause of the bug nor what is so special about the way to reproduce it.

[Lionel Dricot (ploum-deactivatedaccount)]

This was introduced with rev. 763

[Lionel Dricot (ploum-deactivatedaccount)]

Finally fixed in rev. 792. Please test.

[Tomasz Melcer (liori)]

Seems to work. Thank you!