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Bug 659022 - gtk_tree_model_filter_clear_cache_helper: assertion failed

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This bug is resolved by fixing two things in
gtk_tree_model_filter_row_deleted():

  (1) It is possible for an elt to have elt->visible_siter == NULL, when
  it is deleted.  Only call g_sequence_remove() if this pointer is
  non-NULL.

  (2) For the case len (level->seq) > 1, free the elt->children level
  if non-NULL.  Failing to do this means the level will stick around.
  If this child level was not referenced, it will still have a zero
  ref count on its parent which cannot be removed!

For both bugs unit tests have been added in the preceding commit.
This commit is contained in:
Kristian Rietveld
2011-10-03 22:38:42 +02:00
parent e8323e2abc
commit bbc1e883a8
1 changed files with 19 additions and 18 deletions
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37
gtk/gtktreemodelfilter.c
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@ -2614,20 +2614,21 @@ gtk_tree_model_filter_row_deleted (GtkTreeModel *c_model,
gtk_tree_model_filter_real_unref_node (GTK_TREE_MODEL (data), &iter,
TRUE, FALSE);
if (elt->children)
/* If this last node has children, then the recursion in free_level
* will release this reference.
*/
while (elt->ref_count > 1)
gtk_tree_model_filter_real_unref_node (GTK_TREE_MODEL (data), &iter,
FALSE, FALSE);
else
while (elt->ref_count > 0)
gtk_tree_model_filter_real_unref_node (GTK_TREE_MODEL (data), &iter,
FALSE, FALSE);
if (g_sequence_get_length (level->seq) == 1)
{
if (elt->children)
/* If this last node has children, then the recursion in free_level
* will release this reference.
*/
while (elt->ref_count > 1)
gtk_tree_model_filter_real_unref_node (GTK_TREE_MODEL (data), &iter,
FALSE, FALSE);
else
while (elt->ref_count > 0)
gtk_tree_model_filter_real_unref_node (GTK_TREE_MODEL (data), &iter,
FALSE, FALSE);
/* kill level */
gtk_tree_model_filter_free_level (filter, level, FALSE, TRUE, FALSE);
}
@ -2636,16 +2637,16 @@ gtk_tree_model_filter_row_deleted (GtkTreeModel *c_model,
GSequenceIter *tmp;
gboolean is_first;
/* Release last references, if needed */
while (elt->ref_count > 0)
gtk_tree_model_filter_real_unref_node (GTK_TREE_MODEL (data), &iter,
FALSE, FALSE);
lookup_elt_with_offset (level->seq, elt->offset, &siter);
is_first = g_sequence_get_begin_iter (level->seq) == siter;
if (elt->children)
gtk_tree_model_filter_free_level (filter, elt->children,
FALSE, TRUE, FALSE);
/* remove the row */
g_sequence_remove (elt->visible_siter);
if (elt->visible_siter)
g_sequence_remove (elt->visible_siter);
tmp = g_sequence_iter_next (siter);
g_sequence_remove (siter);
g_sequence_foreach_range (tmp, g_sequence_get_end_iter (level->seq),