structuredAttrs is enabled

trying https://static.crates.io/crates/p521/0.14.0-rc.15/download
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100 113.2k 100 113.2k   0      0  5.56M      0                              0