rust/tests/ui/mismatched_types/issue-47706-trait.stderr

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error[E0593]: function is expected to take a single 0-tuple as argument, but it takes 2 distinct arguments
--> $DIR/issue-47706-trait.rs:3:24
|
LL | fn f(&self, _: ()) {
| ------------------ takes 2 distinct arguments
LL | None::<()>.map(Self::f);
| --- ^^^^^^^ expected function that takes a single 0-tuple as argument
| |
| required by a bound introduced by this call
|
note: required by a bound in `Option::<T>::map`
--> $SRC_DIR/core/src/option.rs:LL:COL
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0593`.