error: you seem to be using .map() to clone the contents of an iterator, consider using `.cloned()`
  --> map_clone.rs:12:5
   |
12 |     x.iter().map(|y| y.clone());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.iter().cloned()

error: you seem to be using .map() to clone the contents of an iterator, consider using `.cloned()`
  --> map_clone.rs:14:5
   |
14 |     x.iter().map(|&y| y);
   |     ^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.iter().cloned()

error: you seem to be using .map() to clone the contents of an iterator, consider using `.cloned()`
  --> map_clone.rs:16:5
   |
16 |     x.iter().map(|y| *y);
   |     ^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.iter().cloned()

error: you seem to be using .map() to clone the contents of an iterator, consider using `.cloned()`
  --> map_clone.rs:18:5
   |
18 |     x.iter().map(|y| { y.clone() });
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.iter().cloned()

error: you seem to be using .map() to clone the contents of an iterator, consider using `.cloned()`
  --> map_clone.rs:20:5
   |
20 |     x.iter().map(|&y| { y });
   |     ^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.iter().cloned()

error: you seem to be using .map() to clone the contents of an iterator, consider using `.cloned()`
  --> map_clone.rs:22:5
   |
22 |     x.iter().map(|y| { *y });
   |     ^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.iter().cloned()

error: you seem to be using .map() to clone the contents of an iterator, consider using `.cloned()`
  --> map_clone.rs:24:5
   |
24 |     x.iter().map(Clone::clone);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.iter().cloned()

error: you seem to be using .map() to clone the contents of an Option, consider using `.cloned()`
  --> map_clone.rs:30:5
   |
30 |     x.as_ref().map(|y| y.clone());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.as_ref().cloned()

error: you seem to be using .map() to clone the contents of an Option, consider using `.cloned()`
  --> map_clone.rs:32:5
   |
32 |     x.as_ref().map(|&y| y);
   |     ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.as_ref().cloned()

error: you seem to be using .map() to clone the contents of an Option, consider using `.cloned()`
  --> map_clone.rs:34:5
   |
34 |     x.as_ref().map(|y| *y);
   |     ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.as_ref().cloned()

error: you seem to be using .map() to clone the contents of an Option, consider using `.cloned()`
  --> map_clone.rs:90:35
   |
90 |     let _: Option<UnusualDeref> = x.as_ref().map(|y| *y);
   |                                   ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D map-clone` implied by `-D warnings`
   = help: try
           x.as_ref().cloned()

error: aborting due to 11 previous errors

error: Could not compile `clippy_tests`.

To learn more, run the command again with --verbose.