docs: def on_unexpected_error(e):  # pragma: no cover
      """Catch-all error handler
  
      Unexpected errors will be handled by this function.
      """
      sys.stderr.write('Unexpected error: {} ({})\n'.format(
          str(e), e.__class__.__name__))
      sys.stderr.write('See file slam_error.log for additional details.\n')
      sys.exit(1)