structuredAttrs is enabled

trying https://crates.io/api/v1/crates/syn-solidity/1.6.1/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  59946 100  59946   0      0 243.7k      0                              0