module Roda::RodaPlugins::ErrorHandler::InstanceMethods

def _handle_error(e)

when doing so, log the error using rack.errors and return the response.
of 500. Run after hooks on the rack response, but if any error occurs
Handle the given exception using handle_error, using a default status 
def _handle_error(e)
  res = @_response
  res.send(:initialize)
  res.status = 500
  res = _roda_handle_route{handle_error(e)}
  begin
    _roda_after(res)
  rescue => e2
    if errors = env['rack.errors']
      errors.puts "Error in after hook processing of error handler: #{e2.class}: #{e2.message}"
      e2.backtrace.each{|line| errors.puts(line)}
    end
  end
  res
end