error[E0433]: failed to resolve: use of undeclared type `HashMap`
  --> $DIR/issue-109250.rs:2:5
   |
LL |     HashMap::new;
   |     ^^^^^^^ use of undeclared type `HashMap`
   |
help: consider importing this struct
   |
LL + use std::collections::HashMap;
   |

error: aborting due to previous error

For more information about this error, try `rustc --explain E0433`.