error[E0599]: no method named `count` found for array `[{integer}; 4]` in the current scope
  --> $DIR/count2len.rs:5:11
   |
LL |     slice.count();
   |           ^^^^^
   |           |
   |           method cannot be called on `[{integer}; 4]` due to unsatisfied trait bounds
   |           help: consider using `len` instead
   |
   = note: `count` is defined on `Iterator`, which `[{integer}; 4]` does not implement

error[E0599]: no method named `count` found for struct `Vec<{integer}>` in the current scope
  --> $DIR/count2len.rs:6:9
   |
LL |     vec.count();
   |         ^^^^^
   |         |
   |         method cannot be called on `Vec<{integer}>` due to unsatisfied trait bounds
   |         help: consider using `len` instead
   |
   = note: `count` is defined on `Iterator`, which `Vec<{integer}>` does not implement

error[E0599]: no method named `count` found for reference `&[{integer}]` in the current scope
  --> $DIR/count2len.rs:7:20
   |
LL |     vec.as_slice().count();
   |                    ^^^^^
   |                    |
   |                    method cannot be called on `&[{integer}]` due to unsatisfied trait bounds
   |                    help: consider using `len` instead
   |
   = note: `count` is defined on `Iterator`, which `&[{integer}]` does not implement

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0599`.