catch (Throwable t) { rethrow(t);
catch (RuntimeException e) { rethrow(e, RuntimeException.class);
  public Value execute(Env env)    throws Throwable  {    try {      if (env.findClass(_cl.getName()) == null)        env.addClass(_cl.getName(), new QuercusClass(_cl, null));    }    catch (Throwable t) {      rethrow(t);    }    return null;  }