Bug 24053 - TreeSortableAdapter NullReferencePointer exception
Summary: TreeSortableAdapter NullReferencePointer exception
Status: NEW
Alias: None
Product: Gtk#
Classification: Mono
Component: gtk-sharp ()
Version: 2.x
Hardware: PC Linux
: --- normal
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2014-10-25 08:32 UTC by Martin Kupec
Modified: 2014-10-25 08:32 UTC (History)
1 user (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
NEW

Description Martin Kupec 2014-10-25 08:32:29 UTC
There is and problem in TreeSortableAdapter causing NullReferencePointer exception when used.

The problem is, that GTK call gtk_tree_sortable_get_sort_column_id function with NULL as order parameter.
It can be found here https://github.com/GNOME/gtk/blob/2b1cad0289b17183b6c5f10e64c5a8ddb92709c3/gtk/gtktreeviewcolumn.c:958

The GTK-Sharp generated code for TreeSortableAdapter looks like:
static bool GetSortColumnIdCallback (IntPtr sortable, out int sort_column_id, out int order)
{
     try {
           Gtk.TreeSortableImplementor __obj = GLib.Object.GetObject (sortable, false) as Gtk.TreeSortableImplementor;
           Gtk.SortType myorder;
           bool __result = __obj.GetSortColumnId (out sort_column_id, out myorder);
           order = (int) myorder;
           return __result;
     } catch (Exception e) {
          GLib.ExceptionManager.RaiseUnhandledException (e, true);
          // NOTREACHED: above call does not return.
          throw e;
     }
}

The problem is the line "order = (int)myorder" as the function is called with "order = null".

This gtk function is called when adding TreeColumn to TreeView, so the TreeSortableAdapter as is now is probably useless.