Object of class stdClass could not be converted to string in views_plugin_style_lineage_nested.inc on line 267

        $output .= $this->nested_list($row, $key, $type, $depth);

Backtrace:
nested_list(string)[views_plugin_style_lineage_nested.inc:264];
.nested_list(string)[views_plugin_style_lineage_nested.inc:185];
..render(string)[theme.inc:46];
...template_preprocess_views_view(string)[?:?];
....call_user_func_array(string)[theme.inc:697];
.....theme(string)[views_plugin_display.inc:2025];
......render(a:0:{})[view.inc:823];
.......render(a:0:{})[views_plugin_display.inc:2105];
........preview(a:0:{})[view.inc:918];
.........preview(a:2:{i:0;s:7:"default";i:1;a:0:{}})[admin.inc:418];
..........views_ui_preview(string)[?:?];
...........call_user_func_array(string)[menu.inc:348];
............menu_execute_active_handler(a:0:{})[index.php:18];
.............index.php

Location admin/build/views/ajax/preview/Terms
Referrer admin/build/views/edit/Terms

Ah, sorry, it's duplicate.
#783488: stdClass error