error: non-binding `let` on a future --> $DIR/let_underscore_future.rs:14:5 | LL | let _ = some_async_fn(); | ^^^^^^^^^^^^^^^^^^^^^^^^ | = help: consider awaiting the future or dropping explicitly with `std::mem::drop` = note: `-D clippy::let-underscore-future` implied by `-D warnings` error: non-binding `let` on a future --> $DIR/let_underscore_future.rs:15:5 | LL | let _ = custom(); | ^^^^^^^^^^^^^^^^^ | = help: consider awaiting the future or dropping explicitly with `std::mem::drop` error: non-binding `let` on a future --> $DIR/let_underscore_future.rs:19:5 | LL | let _ = future; | ^^^^^^^^^^^^^^^ | = help: consider awaiting the future or dropping explicitly with `std::mem::drop` error: aborting due to 3 previous errors