Comment 3 for bug 913710

StacktraceTop:
 _gtk_tree_selection_internal_select_node (selection=0x27e1b20, node=0x0, tree=0x0, path=0x3a4b4c0, mode=<optimized out>, override_browse_mode=<optimized out>) at /build/buildd/gtk+3.0-3.3.6/./gtk/gtktreeselection.c:1575
 gtk_tree_view_real_toggle_cursor_row (tree_view=0x26c18a0) at /build/buildd/gtk+3.0-3.3.6/./gtk/gtktreeview.c:10775
 gtk_tree_view_button_press (widget=0x26c18a0, event=0x3a22b80) at /build/buildd/gtk+3.0-3.3.6/./gtk/gtktreeview.c:3103
 rb_tree_dnd_button_press_event_cb (widget=0x26c18a0, event=0x3a22b80, data=<optimized out>) at rb-tree-dnd.c:929
 _gtk_marshal_BOOLEAN__BOXED (closure=0x27f4ef0, return_value=0x7fff1c18b4a0, n_param_values=<optimized out>, param_values=0x7f32e00edb50, invocation_hint=<optimized out>, marshal_data=<optimized out>) at /build/buildd/gtk+3.0-3.3.6/./gtk/gtkmarshalers.c:85