error[E0277]: `[(); _]` is not a future --> $DIR/unresolved-ct-var-drop-tracking.rs:7:45 | LL | let s = std::array::from_fn(|_| ()).await; | ----------------------------^^^^^ | | || | | |`[(); _]` is not a future | | help: remove the `.await` | this call returns `[(); _]` | = help: the trait `Future` is not implemented for `[(); _]` = note: [(); _] must be a future or must implement `IntoFuture` to be awaited = note: required for `[(); _]` to implement `IntoFuture` error[E0698]: type inside `async` block must be known in this context --> $DIR/unresolved-ct-var-drop-tracking.rs:7:17 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^^^^^^^^^^^^^^^ cannot infer the value of const parameter `N` declared on the function `from_fn` | note: the type is part of the `async` block because of this `await` --> $DIR/unresolved-ct-var-drop-tracking.rs:7:45 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^ error[E0698]: type inside `async` block must be known in this context --> $DIR/unresolved-ct-var-drop-tracking.rs:7:17 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^^^^^^^^^^^^^^^ cannot infer the value of const parameter `N` declared on the function `from_fn` | note: the type is part of the `async` block because of this `await` --> $DIR/unresolved-ct-var-drop-tracking.rs:7:45 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^ error[E0698]: type inside `async` block must be known in this context --> $DIR/unresolved-ct-var-drop-tracking.rs:7:17 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^^^^^^^^^^^^^^^ cannot infer the value of const parameter `N` declared on the function `from_fn` | note: the type is part of the `async` block because of this `await` --> $DIR/unresolved-ct-var-drop-tracking.rs:7:45 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^ error[E0698]: type inside `async` block must be known in this context --> $DIR/unresolved-ct-var-drop-tracking.rs:7:17 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^^^^^^^^^^^^^^^ cannot infer the value of const parameter `N` declared on the function `from_fn` | note: the type is part of the `async` block because of this `await` --> $DIR/unresolved-ct-var-drop-tracking.rs:7:45 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^ error[E0698]: type inside `async` block must be known in this context --> $DIR/unresolved-ct-var-drop-tracking.rs:7:17 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^^^^^^^^^^^^^^^ cannot infer the value of const parameter `N` declared on the function `from_fn` | note: the type is part of the `async` block because of this `await` --> $DIR/unresolved-ct-var-drop-tracking.rs:7:45 | LL | let s = std::array::from_fn(|_| ()).await; | ^^^^^ error: aborting due to 6 previous errors Some errors have detailed explanations: E0277, E0698. For more information about an error, try `rustc --explain E0277`.