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error[E0631]: type mismatch in closure arguments
--> $DIR/issue-36053-2.rs:7:32
|
LL | once::<&str>("str").fuse().filter(|a: &str| true).count();
| ^^^^^^ --------- found signature defined here
| |
| expected due to this
|
= note: expected closure signature `for<'r> fn(&'r &str) -> _`
found closure signature `for<'r> fn(&'r str) -> _`
note: required by a bound in `filter`
--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
|
LL | P: FnMut(&Self::Item) -> bool,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `filter`
error[E0599]: the method `count` exists for struct `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>`, but its trait bounds were not satisfied
--> $DIR/issue-36053-2.rs:7:55
|
LL | once::<&str>("str").fuse().filter(|a: &str| true).count();
| --------- ^^^^^ method cannot be called on `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>` due to unsatisfied trait bounds
| |
| doesn't satisfy `<_ as FnOnce<(&&str,)>>::Output = bool`
| doesn't satisfy `_: FnMut<(&&str,)>`
|
::: $SRC_DIR/core/src/iter/adapters/filter.rs:LL:COL
|
LL | pub struct Filter<I, P> {
| ----------------------- doesn't satisfy `_: Iterator`
|
= note: the following trait bounds were not satisfied:
`<[closure@$DIR/issue-36053-2.rs:7:39: 7:48] as FnOnce<(&&str,)>>::Output = bool`
which is required by `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>: Iterator`
`[closure@$DIR/issue-36053-2.rs:7:39: 7:48]: FnMut<(&&str,)>`
which is required by `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>: Iterator`
`Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>: Iterator`
which is required by `&mut Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>: Iterator`
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0599, E0631.
For more information about an error, try `rustc --explain E0599`.
|
