plugin=diff is not implemented.
http://yellow.ribbon.to/~tuotehhou/index.php?%2BSL%2B%E7%99%BA%E7%94%9F%E3%81%97%E3%81%9F%E4%BE%8B%E5%A4%96%E3%81%AEStackTrace%E3%81%AE%E8%A1%8C%E7%95%AA%E5%8F%B7%E3%82%92%E5%88%86%E6%9E%90
plugin=diff is not implemented.