structuredAttrs is enabled

trying https://static.crates.io/crates/proc-macro-error-attr3/3.1.1/download
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed

  0      0   0      0   0      0      0      0                              0
100   8158 100   8158   0      0 148.3k      0                              0
100   8158 100   8158   0      0 148.2k      0                              0
100   8158 100   8158   0      0 148.0k      0                              0