Add lots of debug code to solve these damned crashes. Dont create multiple

2003-02-21  Marco Pesenti Gritti  <marco@it.gnome.org>

	* lib/widgets/ephy-editable-toolbar.c: (find_action),
	(impl_get_action), (ui_update), (queue_ui_update),
	(drag_data_received_cb), (drag_data_delete_cb), (drag_data_get_cb),
	(connect_item_drag_source), (disconnect_item_drag_source),
	(setup_toolbar), (setup_item), (ensure_toolbar_min_size),
	(do_merge), (ensure_action), (group_changed_cb),
	(ephy_editable_toolbar_set_group),
	(ephy_editable_toolbar_set_merge), (hide_editor),
	(editor_close_cb), (editor_add_toolbar_cb),
	(editor_drag_data_received_cb), (editor_drag_data_delete_cb),
	(setup_editor), (add_to_list), (update_editor_sheet),
	(update_editor_position), (button_press_cb), (show_editor),
	(set_action_sensitive), (ephy_editable_toolbar_edit):
	* lib/widgets/ephy-toolbars-group.c: (ephy_toolbars_group_to_xml),
	(toolbars_group_save), (toolbars_item_new), (free_toolbar_node),
	(free_item_node), (ephy_toolbars_group_add_item),
	(ephy_toolbars_group_add_toolbar), (load_defaults), (load_toolbar),
	(ephy_toolbars_group_to_string),
	(ephy_toolbars_group_remove_toolbar),
	(ephy_toolbars_group_remove_item),
	(ephy_toolbars_group_set_source), (is_item_in_toolbars),
	(ephy_toolbars_group_foreach_available),
	(ephy_toolbars_group_foreach_toolbar),
	(ephy_toolbars_group_foreach_item), (ephy_toolbars_group_get_path):
	* src/toolbar.c: (toolbar_get_action):

	Add lots of debug code to solve these damned crashes.
	Dont create multiple actions for the same bookmark.
	There are two crashes that I can repro now. 1 Adding bookmarks
	with more then one toolbar opened, and then open tbe.
	2 Add multiple "links" to the same bookmark and then close.
	But I'm sure xan can find more ;)

2 files changed, 129 insertions, 3 deletions

diff --git a/lib/widgets/ephy-editable-toolbar.c b/lib/widgets/ephy-editable-toolbar.c
index c8b2d9f9e..bb3288805 100755
--- a/lib/widgets/ephy-editable-toolbar.c
+++ b/lib/widgets/ephy-editable-toolbar.c
@@ -122,6 +122,9 @@ find_action (EphyEditableToolbar *t, const char *name)
 	GList *l = t->priv->merge->action_groups;
 	EggAction *action = NULL;
 
+	g_return_val_if_fail (IS_EPHY_EDITABLE_TOOLBAR (t), NULL);
+	g_return_val_if_fail (name != NULL, NULL);
+
 	for (; l != NULL; l = l->next)
 	{
 		EggAction *tmp;
@@ -141,6 +144,8 @@ impl_get_action (EphyEditableToolbar *etoolbar,
 {
 	EggAction *action;
 
+	g_return_val_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar), NULL);
+
 	if (type == NULL)
 	{
 		action = find_action (etoolbar, name);
@@ -158,6 +163,8 @@ ui_update (gpointer data)
 {
 	EphyEditableToolbar *etoolbar = EPHY_EDITABLE_TOOLBAR (data);
 
+	g_return_val_if_fail (etoolbar != NULL, FALSE);
+
 	if (etoolbar->priv->toolbars_dirty)
 	{
 		LOG ("Update ui: toolbars")
@@ -185,6 +192,8 @@ ui_update (gpointer data)
 static void
 queue_ui_update (EphyEditableToolbar *etoolbar)
 {
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	g_idle_add (ui_update, etoolbar);
 }
 
@@ -205,11 +214,14 @@ drag_data_received_cb (GtkWidget *widget,
 	GdkAtom target;
 	EggAction *action;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	toolbar = (EphyToolbarsToolbar *)g_object_get_data (G_OBJECT (widget), "toolbar_data");
 
 	if (!toolbar)
 	{
 		sibling = (EphyToolbarsItem *)g_object_get_data (G_OBJECT (widget), "item_data");
+		g_return_if_fail (sibling != NULL);
 		parent = sibling->parent;
 	}
 	else
@@ -218,6 +230,8 @@ drag_data_received_cb (GtkWidget *widget,
 		parent = toolbar;
 	}
 
+	g_return_if_fail (parent != NULL);
+
 	target = gtk_drag_dest_find_target (widget, context, NULL);
 	if (target == gdk_atom_intern (EPHY_DND_URL_TYPE, FALSE))
 	{
@@ -229,7 +243,6 @@ drag_data_received_cb (GtkWidget *widget,
 	{
 		ephy_toolbars_group_add_item (etoolbar->priv->group, parent, sibling,
 					      action->name);
-
 		etoolbar->priv->toolbars_dirty = TRUE;
 		queue_ui_update (etoolbar);
 	}
@@ -242,7 +255,10 @@ drag_data_delete_cb (GtkWidget *widget,
 {
 	EphyToolbarsItem *node;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	node = (EphyToolbarsItem *)g_object_get_data (G_OBJECT (widget), "item_data");
+	g_return_if_fail (node != NULL);
 	ephy_toolbars_group_remove_item (etoolbar->priv->group, node);
 
 	etoolbar->priv->toolbars_dirty = TRUE;
@@ -260,6 +276,8 @@ drag_data_get_cb (GtkWidget *widget,
 	EggAction *action;
 	const char *target;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	action = EGG_ACTION (g_object_get_data (G_OBJECT (widget), "egg-action"));
 	target = action->name;
 
@@ -275,6 +293,9 @@ connect_item_drag_source (EphyToolbarsItem *item, EphyEditableToolbar *etoolbar)
 {
 	GtkWidget *toolitem;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+	g_return_if_fail (item != NULL);
+
 	toolitem = item->widget;
 
 	if (!g_object_get_data (G_OBJECT (toolitem), "drag_source_set"))
@@ -296,6 +317,9 @@ disconnect_item_drag_source (EphyToolbarsItem *item, EphyEditableToolbar *etoolb
 {
 	GtkWidget *toolitem;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+	g_return_if_fail (item != NULL);
+
 	toolitem = item->widget;
 
 	if (g_object_get_data (G_OBJECT (toolitem), "drag_source_set"))
@@ -318,10 +342,15 @@ setup_toolbar (EphyToolbarsToolbar *toolbar, EphyEditableToolbar *etoolbar)
 	GtkWidget *widget;
 	char *path;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+	g_return_if_fail (toolbar != NULL);
+
 	path = ephy_toolbars_group_get_path (etoolbar->priv->group, toolbar);
+	g_return_if_fail (path != NULL);
 
 	widget = egg_menu_merge_get_widget (etoolbar->priv->merge, path);
 	g_object_set_data (G_OBJECT (widget), "toolbar_data", toolbar);
+	g_return_if_fail (toolbar != NULL);
 	toolbar->widget = widget;
 
 	if (!g_object_get_data (G_OBJECT (widget), "drag_dest_set"))
@@ -348,9 +377,14 @@ setup_item (EphyToolbarsItem *item, EphyEditableToolbar *etoolbar)
 	GtkWidget *toolitem;
 	char *path;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+	g_return_if_fail (item != NULL);
+
 	path = ephy_toolbars_group_get_path (etoolbar->priv->group, item);
+	g_return_if_fail (path != NULL);
 
 	toolitem = egg_menu_merge_get_widget (etoolbar->priv->merge, path);
+	g_return_if_fail (toolitem != NULL);
 	item->widget = toolitem;
 
 	g_object_set_data (G_OBJECT (toolitem), "item_data", item);
@@ -377,6 +411,9 @@ ensure_toolbar_min_size (EphyToolbarsToolbar *toolbar, EphyEditableToolbar *t)
 {
 	GtkWidget *widget;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (t));
+	g_return_if_fail (toolbar != NULL);
+
 	widget = toolbar->widget;
 
 	if (EGG_TOOLBAR (widget)->num_children == 0)
@@ -395,9 +432,10 @@ do_merge (EphyEditableToolbar *t)
 	char *str;
 	guint ui_id;
 
-	g_return_if_fail (t != NULL);
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (t));
 
 	str = ephy_toolbars_group_to_string (t->priv->group);
+	g_return_if_fail (str != NULL);
 
 	LOG ("Merge UI\n%s", str)
 
@@ -440,12 +478,18 @@ do_merge (EphyEditableToolbar *t)
 static void
 ensure_action (EphyToolbarsItem *item, EphyEditableToolbar *t)
 {
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (t));
+	g_return_if_fail (item != NULL);
+
 	ephy_editable_toolbar_get_action (t, NULL, item->action);
 }
 
 static void
 group_changed_cb (EphyToolbarsGroup *group, EphyEditableToolbar *t)
 {
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (group));
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (t));
+
 	t->priv->toolbars_dirty = TRUE;
 
 	ephy_toolbars_group_foreach_item (t->priv->group,
@@ -458,6 +502,9 @@ group_changed_cb (EphyToolbarsGroup *group, EphyEditableToolbar *t)
 static void
 ephy_editable_toolbar_set_group (EphyEditableToolbar *t, EphyToolbarsGroup *group)
 {
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (group));
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (t));
+
 	t->priv->group = group;
 
 	g_signal_connect (group, "changed",
@@ -468,6 +515,9 @@ ephy_editable_toolbar_set_group (EphyEditableToolbar *t, EphyToolbarsGroup *grou
 static void
 ephy_editable_toolbar_set_merge (EphyEditableToolbar *t, EggMenuMerge *merge)
 {
+	g_return_if_fail (EGG_IS_MENU_MERGE (merge));
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (t));
+
 	t->priv->merge = merge;
 
 	LOG ("Got MenuMerge")
@@ -663,6 +713,8 @@ editor_get_dimensions (EphyEditableToolbar *etoolbar, GtkWidget *toolbar,
 static void
 hide_editor (EphyEditableToolbar *etoolbar)
 {
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	gtk_grab_remove (GTK_WIDGET (etoolbar->priv->editor));
 	gtk_widget_hide (GTK_WIDGET (etoolbar->priv->editor));
 }
@@ -670,6 +722,8 @@ hide_editor (EphyEditableToolbar *etoolbar)
 static void
 editor_close_cb (GtkWidget *button, EphyEditableToolbar *etoolbar)
 {
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	etoolbar->priv->edit_mode = FALSE;
 	ephy_toolbars_group_foreach_item (etoolbar->priv->group,
 					  (EphyToolbarsGroupForeachItemFunc)
@@ -681,6 +735,8 @@ editor_close_cb (GtkWidget *button, EphyEditableToolbar *etoolbar)
 static void
 editor_add_toolbar_cb (GtkWidget *button, EphyEditableToolbar *etoolbar)
 {
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	ephy_toolbars_group_add_toolbar (etoolbar->priv->group);
 
 	etoolbar->priv->toolbars_dirty = TRUE;
@@ -698,6 +754,8 @@ editor_drag_data_received_cb (GtkWidget *widget,
 		              guint time_,
 		              EphyEditableToolbar *etoolbar)
 {
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	etoolbar->priv->editor_sheet_dirty = TRUE;
 	etoolbar->priv->editor_pos_dirty = TRUE;
 	queue_ui_update (etoolbar);
@@ -708,6 +766,8 @@ editor_drag_data_delete_cb (GtkWidget *widget,
                             GdkDragContext *context,
                             EphyEditableToolbar *etoolbar)
 {
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	etoolbar->priv->editor_sheet_dirty = TRUE;
 	etoolbar->priv->editor_pos_dirty = TRUE;
 	queue_ui_update (etoolbar);
@@ -726,6 +786,8 @@ setup_editor (EphyEditableToolbar *etoolbar)
 	GtkWidget *button;
 	GtkWidget *frame;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	editor = gtk_window_new (GTK_WINDOW_POPUP);
 	etoolbar->priv->editor = editor;
 	frame = gtk_frame_new (NULL);
@@ -783,6 +845,8 @@ setup_editor (EphyEditableToolbar *etoolbar)
 static void
 add_to_list (EphyToolbarsItem *item, GList **l)
 {
+	g_return_if_fail (item != NULL);
+
 	*l = g_list_append (*l, item);
 }
 
@@ -795,6 +859,8 @@ update_editor_sheet (EphyEditableToolbar *etoolbar)
 	GtkWidget *table;
 	GtkWidget *viewport;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	viewport = GTK_BIN (etoolbar->priv->scrolled_window)->child;
 	if (viewport)
 	{
@@ -835,6 +901,7 @@ update_editor_sheet (EphyEditableToolbar *etoolbar)
 
 		action = ephy_editable_toolbar_get_action
 			(etoolbar, NULL, node->action);
+		g_return_if_fail (action != NULL);
 
 		event_box = gtk_event_box_new ();
 		gtk_widget_show (event_box);
@@ -885,6 +952,8 @@ update_editor_position (EphyEditableToolbar *etoolbar)
 	GtkWidget *editor;
 	int x, y, height, width;
 
+	g_return_val_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar), FALSE);
+
 	editor_get_dimensions (etoolbar, etoolbar->priv->last_toolbar,
 			       &x, &y, &width, &height);
 	editor = etoolbar->priv->editor;
@@ -904,6 +973,8 @@ button_press_cb (GtkWidget *w,
 	GtkWidget *widget;
 	GtkWidget *toolitem;
 
+	g_return_val_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar), FALSE);
+
 	widget = gtk_get_event_widget (event);
 	toolitem = gtk_widget_get_ancestor (widget, EGG_TYPE_TOOL_ITEM);
 
@@ -928,6 +999,7 @@ show_editor (EphyEditableToolbar *etoolbar)
 {
 	GtkWidget *editor = etoolbar->priv->editor;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
 	g_return_if_fail (editor != NULL);
 
 	gtk_widget_show (GTK_WIDGET (editor));
@@ -943,6 +1015,9 @@ set_action_sensitive (EphyToolbarsItem *item, EphyEditableToolbar *etoolbar)
 {
 	EggAction *action;
 
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+	g_return_if_fail (item != NULL);
+
 	if (!item->separator)
 	{
 		action = find_action (etoolbar, item->action);
@@ -953,6 +1028,8 @@ set_action_sensitive (EphyToolbarsItem *item, EphyEditableToolbar *etoolbar)
 void
 ephy_editable_toolbar_edit (EphyEditableToolbar *etoolbar)
 {
+	g_return_if_fail (IS_EPHY_EDITABLE_TOOLBAR (etoolbar));
+
 	etoolbar->priv->edit_mode = TRUE;
 	ephy_toolbars_group_foreach_item (etoolbar->priv->group,
 					  (EphyToolbarsGroupForeachItemFunc)
diff --git a/lib/widgets/ephy-toolbars-group.c b/lib/widgets/ephy-toolbars-group.c
index 753aca4a1..e923044f1 100755
--- a/lib/widgets/ephy-toolbars-group.c
+++ b/lib/widgets/ephy-toolbars-group.c
@@ -79,6 +79,8 @@ ephy_toolbars_group_to_xml (EphyToolbarsGroup *t)
 	GNode *l1, *l2, *tl;
 	xmlDocPtr doc;
 
+	g_return_val_if_fail (IS_EPHY_TOOLBARS_GROUP (t), NULL);
+
 	tl = t->priv->toolbars;
 
 	xmlIndentTreeOutput = TRUE;
@@ -116,6 +118,8 @@ toolbars_group_save (EphyToolbarsGroup *t)
 {
 	xmlDocPtr doc;
 
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (t));
+
 	doc = ephy_toolbars_group_to_xml (t);
 	xmlSaveFormatFile (t->priv->user, doc, 1);
 	xmlFreeDoc (doc);
@@ -137,6 +141,8 @@ toolbars_item_new (const char *action, gboolean separator)
 {
 	EphyToolbarsItem *item;
 
+	g_return_val_if_fail (action != NULL, NULL);
+
 	item = g_new0 (EphyToolbarsItem, 1);
 	item->action = g_strdup (action);
 	item->separator = separator;
@@ -148,12 +154,16 @@ toolbars_item_new (const char *action, gboolean separator)
 static void
 free_toolbar_node (EphyToolbarsToolbar *toolbar)
 {
+	g_return_if_fail (toolbar != NULL);
+
 	g_free (toolbar);
 }
 
 static void
 free_item_node (EphyToolbarsItem *item)
 {
+	g_return_if_fail (item != NULL);
+
 	g_free (item->action);
 	g_free (item);
 }
@@ -187,12 +197,17 @@ ephy_toolbars_group_add_item (EphyToolbarsGroup *t,
 	GNode *parent_node;
 	GNode *sibling_node = NULL;
 
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (t));
+	g_return_if_fail (parent != NULL);
+	g_return_if_fail (name != NULL);
+
 	parent_node = g_node_find (t->priv->toolbars, G_IN_ORDER, G_TRAVERSE_ALL, parent);
 
 	if (sibling)
 	{
 		sibling_node = g_node_find (t->priv->toolbars, G_IN_ORDER,
 					    G_TRAVERSE_ALL, sibling);
+		g_return_if_fail (sibling_node != NULL);
 	}
 
 	add_action (t, parent_node, sibling_node, name);
@@ -245,7 +260,10 @@ ephy_toolbars_group_add_toolbar (EphyToolbarsGroup *t)
 {
 	GNode *node;
 
+	g_return_val_if_fail (IS_EPHY_TOOLBARS_GROUP (t), NULL);
+
 	node = add_toolbar (t);
+	g_return_val_if_fail (node != NULL, NULL);
 
 	toolbars_group_save (t);
 
@@ -280,6 +298,8 @@ load_defaults (EphyToolbarsGroup *t)
 	xmlNodePtr root;
 	const char *xml_filepath;
 
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (t));
+
 	LOG ("Load default toolbar info")
 
 	xml_filepath = t->priv->defaults;
@@ -314,6 +334,8 @@ load_toolbar (EphyToolbarsGroup *t)
 	xmlNodePtr root;
 	const char *xml_filepath = t->priv->user;
 
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (t));
+
 	LOG ("Load custom toolbar")
 
 	if (!g_file_test (xml_filepath, G_FILE_TEST_EXISTS)) return;
@@ -333,8 +355,12 @@ ephy_toolbars_group_to_string (EphyToolbarsGroup *t)
 	char *result;
 	int k = 0;
 
+	g_return_val_if_fail (IS_EPHY_TOOLBARS_GROUP (t), NULL);
+
 	tl = t->priv->toolbars;
 
+	g_return_val_if_fail (tl != NULL, NULL);
+
 	s = g_string_new (NULL);
 	g_string_append (s, "<Root>");
 	for (l1 = tl->children; l1 != NULL; l1 = l1->next)
@@ -455,7 +481,11 @@ ephy_toolbars_group_remove_toolbar (EphyToolbarsGroup *t,
 {
 	GNode *node;
 
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (t));
+	g_return_if_fail (toolbar != NULL);
+
 	node = g_node_find (t->priv->toolbars, G_IN_ORDER, G_TRAVERSE_ALL, toolbar);
+	g_return_if_fail (node != NULL);
 	free_toolbar_node (node->data);
 	g_node_destroy (node);
 
@@ -470,7 +500,11 @@ ephy_toolbars_group_remove_item	(EphyToolbarsGroup *t,
 {
 	GNode *node;
 
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (t));
+	g_return_if_fail (item != NULL);
+
 	node = g_node_find (t->priv->toolbars, G_IN_ORDER, G_TRAVERSE_ALL, item);
+	g_return_if_fail (node != NULL);
 	free_toolbar_node (node->data);
 	g_node_destroy (node);
 
@@ -484,6 +518,10 @@ ephy_toolbars_group_set_source (EphyToolbarsGroup *group,
 				const char *defaults,
 				const char *user)
 {
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (group));
+	g_return_if_fail (defaults != NULL);
+	g_return_if_fail (user != NULL);
+
 	group->priv->defaults = g_strdup (defaults);
 	group->priv->user = g_strdup (user);
 
@@ -496,6 +534,9 @@ is_item_in_toolbars (EphyToolbarsGroup *group, const char *action)
 {
 	GNode *l1, *l2;
 
+	g_return_val_if_fail (IS_EPHY_TOOLBARS_GROUP (group), FALSE);
+	g_return_val_if_fail (action != NULL, FALSE);
+
 	for (l1 = group->priv->toolbars->children; l1 != NULL; l1 = l1->next)
 	{
 		for (l2 = l1->children; l2 != NULL; l2 = l2->next)
@@ -517,6 +558,8 @@ ephy_toolbars_group_foreach_available (EphyToolbarsGroup *group,
 {
 	GNode *l1;
 
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (group));
+
 	for (l1 = group->priv->available_actions->children; l1 != NULL; l1 = l1->next)
 	{
 		EphyToolbarsItem *item;
@@ -537,6 +580,8 @@ ephy_toolbars_group_foreach_toolbar (EphyToolbarsGroup *group,
 {
 	GNode *l1;
 
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (group));
+
 	for (l1 = group->priv->toolbars->children; l1 != NULL; l1 = l1->next)
 	{
 		func (l1->data, data);
@@ -550,6 +595,8 @@ ephy_toolbars_group_foreach_item (EphyToolbarsGroup *group,
 {
 	GNode *l1, *l2;
 
+	g_return_if_fail (IS_EPHY_TOOLBARS_GROUP (group));
+
 	for (l1 = group->priv->toolbars->children; l1 != NULL; l1 = l1->next)
 	{
 		for (l2 = l1->children; l2 != NULL; l2 = l2->next)
@@ -567,7 +614,10 @@ ephy_toolbars_group_get_path (EphyToolbarsGroup *t,
 	char *path = NULL;
 	EphyToolbarsItem *titem;
 
+	g_return_val_if_fail (IS_EPHY_TOOLBARS_GROUP (t), NULL);
+
 	node = g_node_find (t->priv->toolbars, G_IN_ORDER, G_TRAVERSE_ALL, item);
+	g_return_val_if_fail (node != NULL, NULL);
 	titem = (EphyToolbarsItem *)node->data;
 
 	switch (g_node_depth (node))
@@ -591,4 +641,3 @@ ephy_toolbars_group_get_path (EphyToolbarsGroup *t,
 
 	return path;
 }
-