error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:19:23
   |
LL | fn foo<T: Default>(v: Vec<T>, w: Vec<T>, mut x: Vec<T>, y: Vec<T>) -> Vec<T> {
   |                       ^^^^^^ help: consider changing the type to: `&[T]`
   |
   = note: `-D clippy::needless-pass-by-value` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::needless_pass_by_value)]`

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:35:11
   |
LL | fn bar(x: String, y: Wrapper) {
   |           ^^^^^^ help: consider changing the type to: `&str`

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:35:22
   |
LL | fn bar(x: String, y: Wrapper) {
   |                      ^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn bar(x: String, y: &Wrapper) {
   |                      +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:44:71
   |
LL | fn test_borrow_trait<T: Borrow<str>, U: AsRef<str>, V>(t: T, u: U, v: V) {
   |                                                                       ^
   |
help: consider taking a reference instead
   |
LL | fn test_borrow_trait<T: Borrow<str>, U: AsRef<str>, V>(t: T, u: U, v: &V) {
   |                                                                       +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:58:18
   |
LL | fn test_match(x: Option<Option<String>>, y: Option<Option<String>>) {
   |                  ^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn test_match(x: Option<Option<&String>>, y: Option<Option<String>>) {
   |                                +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:73:24
   |
LL | fn test_destructure(x: Wrapper, y: Wrapper, z: Wrapper) {
   |                        ^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn test_destructure(x: &Wrapper, y: Wrapper, z: Wrapper) {
   |                        +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:73:36
   |
LL | fn test_destructure(x: Wrapper, y: Wrapper, z: Wrapper) {
   |                                    ^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn test_destructure(x: Wrapper, y: &Wrapper, z: Wrapper) {
   |                                    +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:92:49
   |
LL | fn test_blanket_ref<T: Foo, S: Serialize>(vals: T, serializable: S) {}
   |                                                 ^
   |
help: consider taking a reference instead
   |
LL | fn test_blanket_ref<T: Foo, S: Serialize>(vals: &T, serializable: S) {}
   |                                                 +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:95:18
   |
LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
   |                  ^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn issue_2114(s: &String, t: String, u: Vec<i32>, v: Vec<i32>) {
   |                  +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:95:29
   |
LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
   |                             ^^^^^^
   |
help: consider changing the type to
   |
LL - fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
LL + fn issue_2114(s: String, t: &str, u: Vec<i32>, v: Vec<i32>) {
   |
help: change `t.clone()` to
   |
LL -     let _ = t.clone();
LL +     let _ = t.to_string();
   |

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:95:40
   |
LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
   |                                        ^^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn issue_2114(s: String, t: String, u: &Vec<i32>, v: Vec<i32>) {
   |                                        +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:95:53
   |
LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
   |                                                     ^^^^^^^^
   |
help: consider changing the type to
   |
LL - fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
LL + fn issue_2114(s: String, t: String, u: Vec<i32>, v: &[i32]) {
   |
help: change `v.clone()` to
   |
LL -     let _ = v.clone();
LL +     let _ = v.to_owned();
   |

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:113:12
   |
LL |         s: String,
   |            ^^^^^^ help: consider changing the type to: `&str`

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:115:12
   |
LL |         t: String,
   |            ^^^^^^
   |
help: consider taking a reference instead
   |
LL |         t: &String,
   |            +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:125:23
   |
LL |     fn baz(&self, uu: U, ss: Self) {}
   |                       ^
   |
help: consider taking a reference instead
   |
LL |     fn baz(&self, uu: &U, ss: Self) {}
   |                       +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:125:30
   |
LL |     fn baz(&self, uu: U, ss: Self) {}
   |                              ^^^^
   |
help: consider taking a reference instead
   |
LL |     fn baz(&self, uu: U, ss: &Self) {}
   |                              +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:149:24
   |
LL | fn bar_copy(x: u32, y: CopyWrapper) {
   |                        ^^^^^^^^^^^
   |
help: or consider marking this type as `Copy`
  --> tests/ui/needless_pass_by_value.rs:147:1
   |
LL | struct CopyWrapper(u32);
   | ^^^^^^^^^^^^^^^^^^
help: consider taking a reference instead
   |
LL | fn bar_copy(x: u32, y: &CopyWrapper) {
   |                        +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:157:29
   |
LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
   |                             ^^^^^^^^^^^
   |
help: or consider marking this type as `Copy`
  --> tests/ui/needless_pass_by_value.rs:147:1
   |
LL | struct CopyWrapper(u32);
   | ^^^^^^^^^^^^^^^^^^
help: consider taking a reference instead
   |
LL | fn test_destructure_copy(x: &CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
   |                             +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:157:45
   |
LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
   |                                             ^^^^^^^^^^^
   |
help: or consider marking this type as `Copy`
  --> tests/ui/needless_pass_by_value.rs:147:1
   |
LL | struct CopyWrapper(u32);
   | ^^^^^^^^^^^^^^^^^^
help: consider taking a reference instead
   |
LL | fn test_destructure_copy(x: CopyWrapper, y: &CopyWrapper, z: CopyWrapper) {
   |                                             +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:157:61
   |
LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
   |                                                             ^^^^^^^^^^^
   |
help: or consider marking this type as `Copy`
  --> tests/ui/needless_pass_by_value.rs:147:1
   |
LL | struct CopyWrapper(u32);
   | ^^^^^^^^^^^^^^^^^^
help: consider taking a reference instead
   |
LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: &CopyWrapper) {
   |                                                             +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:173:40
   |
LL | fn some_fun<'b, S: Bar<'b, ()>>(items: S) {}
   |                                        ^
   |
help: consider taking a reference instead
   |
LL | fn some_fun<'b, S: Bar<'b, ()>>(items: &S) {}
   |                                        +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:179:20
   |
LL | fn more_fun(items: impl Club<'static, i32>) {}
   |                    ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn more_fun(items: &impl Club<'static, i32>) {}
   |                    +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:194:24
   |
LL | fn option_inner_ref(x: Option<String>) {
   |                        ^^^^^^^^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn option_inner_ref(x: Option<&String>) {
   |                               +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:204:27
   |
LL | fn non_standard_option(x: non_standard::Option<String>) {
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn non_standard_option(x: &non_standard::Option<String>) {
   |                           +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:209:22
   |
LL | fn option_by_name(x: Option<std::option::Option<core::option::Option<non_standard::Option<String>>>>) {
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn option_by_name(x: Option<std::option::Option<core::option::Option<&non_standard::Option<String>>>>) {
   |                                                                      +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:216:18
   |
LL | fn non_option(x: OptStr) {
   |                  ^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn non_option(x: &OptStr) {
   |                  +

error: this argument is passed by value, but not consumed in the function body
  --> tests/ui/needless_pass_by_value.rs:223:25
   |
LL | fn non_option_either(x: Opt<String>) {
   |                         ^^^^^^^^^^^
   |
help: consider taking a reference instead
   |
LL | fn non_option_either(x: &Opt<String>) {
   |                         +

error: aborting due to 27 previous errors