structuredAttrs is enabled

trying https://static.crates.io/crates/proc-macro-error-attr3/3.0.1/download
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100   8155 100   8155   0      0 168.0k      0                              0