src/test/ui/mismatched_types/issue-36053-2.stderr

   1 error[E0631]: type mismatch in closure arguments
   2   --> $DIR/issue-36053-2.rs:7:32
   3    |
   4 LL |     once::<&str>("str").fuse().filter(|a: &str| true).count();
   5    |                                ^^^^^^ -------------- found signature of `for<'r> fn(&'r str) -> _`
   6    |                                |
   7    |                                expected signature of `for<'r> fn(&'r &str) -> _`
   8
   9 error[E0599]: the method `count` exists for struct `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>`, but its trait bounds were not satisfied
  10   --> $DIR/issue-36053-2.rs:7:55
  11    |
  12 LL |     once::<&str>("str").fuse().filter(|a: &str| true).count();
  13    |                                       --------------  ^^^^^ method cannot be called on `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>` due to unsatisfied trait bounds
  14    |                                       |
  15    |                                       doesn't satisfy `<_ as FnOnce<(&&str,)>>::Output = bool`
  16    |                                       doesn't satisfy `_: FnMut<(&&str,)>`
  17    |
  18   ::: $SRC_DIR/core/src/iter/adapters/filter.rs:LL:COL
  19    |
  20 LL | pub struct Filter<I, P> {
  21    | ----------------------- doesn't satisfy `_: Iterator`
  22    |
  23    = note: the following trait bounds were not satisfied:
  24            `<[closure@$DIR/issue-36053-2.rs:7:39: 7:53] as FnOnce<(&&str,)>>::Output = bool`
  25            which is required by `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>: Iterator`
  26            `[closure@$DIR/issue-36053-2.rs:7:39: 7:53]: FnMut<(&&str,)>`
  27            which is required by `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>: Iterator`
  28            `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>: Iterator`
  29            which is required by `&mut Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>: Iterator`
  30
  31 error: aborting due to 2 previous errors
  32
  33 Some errors have detailed explanations: E0599, E0631.
  34 For more information about an error, try `rustc --explain E0599`.