| error[E0282]: type annotations needed | |
| --> $DIR/type-annotations-needed-expr.rs:2:39 | |
| | | |
| LL | let _ = (vec![1,2,3]).into_iter().sum() as f64; | |
| | ^^^ cannot infer type of the type parameter `S` declared on the method `sum` | |
| | | |
| help: consider specifying the generic argument | |
| | | |
| LL | let _ = (vec![1,2,3]).into_iter().sum::<S>() as f64; | |
| | +++++ | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0282`. |