structuredAttrs is enabled

trying https://static.crates.io/crates/const-serialize-macro/0.8.0-alpha.0/download
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100   3457 100   3457   0      0 100.7k      0                              0