| error[E0059]: type parameter to bare `Fn` trait must be a tuple | |
| --> $DIR/non-tupled-arg-mismatch.rs:3:9 | |
| | | |
| LL | fn a<F: Fn<usize>>(f: F) {} | |
| | ^^^^^^^^^ the trait `Tuple` is not implemented for `usize` | |
| | | |
| note: required by a bound in `Fn` | |
| --> $SRC_DIR/core/src/ops/function.rs:LL:COL | |
| | | |
| LL | pub trait Fn<Args: Tuple>: FnMut<Args> { | |
| | ^^^^^ required by this bound in `Fn` | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0059`. |