error[E0282]: type annotations needed --> $DIR/issue-77092.rs:11:26 | LL | println!("{:?}", take_array_from_mut(&mut arr, i)); | ^^^^^^^^^^^^^^^^^^^ cannot infer the value of the const parameter `N` declared on the function `take_array_from_mut` | help: consider specifying the generic arguments | LL | println!("{:?}", take_array_from_mut::(&mut arr, i)); | ++++++++++ error: aborting due to previous error For more information about this error, try `rustc --explain E0282`.