| error[E0308]: mismatched types | |
| --> $DIR/issue-24819.rs:5:9 | |
| | | |
| LL | foo(&mut v); | |
| | ^^^^^^ expected struct `std::collections::HashSet`, found struct `std::vec::Vec` | |
| | | |
| = note: expected mutable reference `&mut std::collections::HashSet<u32>` | |
| found mutable reference `&mut std::vec::Vec<_>` | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0308`. |