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

   1 error[E0599]: no method named `count` found for struct `std::iter::Filter<std::iter::Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>` in the current scope
   2   --> $DIR/issue-36053-2.rs:7:55
   3    |
   4 LL |     once::<&str>("str").fuse().filter(|a: &str| true).count();
   5    |                                       --------------  ^^^^^ method not found in `std::iter::Filter<std::iter::Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>`
   6    |                                       |
   7    |                                       doesn't satisfy `<_ as std::ops::FnOnce<(&&str,)>>::Output = bool`
   8    |                                       doesn't satisfy `_: std::ops::FnMut<(&&str,)>`
   9    |
  10   ::: $SRC_DIR/libcore/iter/adapters/mod.rs:LL:COL
  11    |
  12 LL | pub struct Filter<I, P> {
  13    | ----------------------- doesn't satisfy `_: std::iter::Iterator`
  14    |
  15    = note: the method `count` exists but the following trait bounds were not satisfied:
  16            `<[closure@$DIR/issue-36053-2.rs:7:39: 7:53] as std::ops::FnOnce<(&&str,)>>::Output = bool`
  17            which is required by `std::iter::Filter<std::iter::Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>: std::iter::Iterator`
  18            `[closure@$DIR/issue-36053-2.rs:7:39: 7:53]: std::ops::FnMut<(&&str,)>`
  19            which is required by `std::iter::Filter<std::iter::Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>: std::iter::Iterator`
  20            `std::iter::Filter<std::iter::Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>: std::iter::Iterator`
  21            which is required by `&mut std::iter::Filter<std::iter::Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:53]>: std::iter::Iterator`
  22
  23 error[E0631]: type mismatch in closure arguments
  24   --> $DIR/issue-36053-2.rs:7:32
  25    |
  26 LL |     once::<&str>("str").fuse().filter(|a: &str| true).count();
  27    |                                ^^^^^^ -------------- found signature of `for<'r> fn(&'r str) -> _`
  28    |                                |
  29    |                                expected signature of `for<'r> fn(&'r &str) -> _`
  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`.