class Sinatra::Base

def handle_exception!(boom)
  @env['sinatra.error'] = boom
  dump_errors!(boom) if settings.dump_errors?
  raise boom if settings.show_exceptions? and settings.show_exceptions != :after_handler
  @response.status = 500
  if res = error_block!(boom.class)
    res
  elsif settings.raise_errors?
    raise boom
  else
    error_block!(Exception)
  end
end