structuredAttrs is enabled

trying https://static.crates.io/crates/signature/3.0.0-rc.10/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  15754 100  15754   0      0 739.3k      0                              0
100  15754 100  15754   0      0 736.7k      0                              0
100  15754 100  15754   0      0 734.8k      0                              0