tests/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    |                                ^^^^^^ ---------
   6    |                                |      |   |
   7    |                                |      |   help: consider borrowing the argument: `&&str`
   8    |                                |      found signature defined here
   9    |                                expected due to this
  10    |
  11    = note: expected closure signature `for<'a> fn(&'a &str) -> _`
  12               found closure signature `for<'a> fn(&'a str) -> _`
  13 note: required by a bound in `filter`
  14   --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
  15
  16 error[E0599]: the method `count` exists for struct `Filter<Fuse<Once<&str>>, [closure@issue-36053-2.rs:7:39]>`, but its trait bounds were not satisfied
  17   --> $DIR/issue-36053-2.rs:7:55
  18    |
  19 LL |     once::<&str>("str").fuse().filter(|a: &str| true).count();
  20    |                                       ---------       ^^^^^ method cannot be called due to unsatisfied trait bounds
  21    |                                       |
  22    |                                       doesn't satisfy `<_ as FnOnce<(&&str,)>>::Output = bool`
  23    |                                       doesn't satisfy `_: FnMut<(&&str,)>`
  24   --> $SRC_DIR/core/src/iter/adapters/filter.rs:LL:COL
  25    |
  26    = note: doesn't satisfy `_: Iterator`
  27    |
  28    = note: the following trait bounds were not satisfied:
  29            `<[closure@$DIR/issue-36053-2.rs:7:39: 7:48] as FnOnce<(&&str,)>>::Output = bool`
  30            which is required by `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>: Iterator`
  31            `[closure@$DIR/issue-36053-2.rs:7:39: 7:48]: FnMut<(&&str,)>`
  32            which is required by `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>: Iterator`
  33            `Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>: Iterator`
  34            which is required by `&mut Filter<Fuse<std::iter::Once<&str>>, [closure@$DIR/issue-36053-2.rs:7:39: 7:48]>: Iterator`
  35
  36 error: aborting due to 2 previous errors
  37
  38 Some errors have detailed explanations: E0599, E0631.
  39 For more information about an error, try `rustc --explain E0599`.