error: swapping temporary values has no effect
  --> tests/ui/swap_with_temporary_unfixable.rs:20:5
   |
LL |     swap(&mut func(), &mut func());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: this expression returns a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:20:15
   |
LL |     swap(&mut func(), &mut func());
   |               ^^^^^^
note: this expression returns a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:20:28
   |
LL |     swap(&mut func(), &mut func());
   |                            ^^^^^^
   = note: `-D clippy::swap-with-temporary` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::swap_with_temporary)]`

error: swapping temporary values has no effect
  --> tests/ui/swap_with_temporary_unfixable.rs:23:17
   |
LL |     if matches!(swap(&mut func(), &mut func()), ()) {
   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: this expression returns a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:23:27
   |
LL |     if matches!(swap(&mut func(), &mut func()), ()) {
   |                           ^^^^^^
note: this expression returns a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:23:40
   |
LL |     if matches!(swap(&mut func(), &mut func()), ()) {
   |                                        ^^^^^^

error: swapping with a temporary value is inefficient
  --> tests/ui/swap_with_temporary_unfixable.rs:28:17
   |
LL |     if matches!(swap(z, &mut func()), ()) {
   |                 ^^^^^^^^^^^^^^^^^^^^
   |
note: this expression returns a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:28:30
   |
LL |     if matches!(swap(z, &mut func()), ()) {
   |                              ^^^^^^

error: swapping with a temporary value is inefficient
  --> tests/ui/swap_with_temporary_unfixable.rs:45:5
   |
LL |     swap(mac!(refmut func()), z);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: this is a mutable reference to a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:45:10
   |
LL |     swap(mac!(refmut func()), z);
   |          ^^^^^^^^^^^^^^^^^^^

error: swapping temporary values has no effect
  --> tests/ui/swap_with_temporary_unfixable.rs:47:5
   |
LL |     swap(&mut mac!(funcall func), &mut mac!(funcall func));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: this expression returns a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:47:15
   |
LL |     swap(&mut mac!(funcall func), &mut mac!(funcall func));
   |               ^^^^^^^^^^^^^^^^^^
note: this expression returns a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:47:40
   |
LL |     swap(&mut mac!(funcall func), &mut mac!(funcall func));
   |                                        ^^^^^^^^^^^^^^^^^^

error: swapping temporary values has no effect
  --> tests/ui/swap_with_temporary_unfixable.rs:49:5
   |
LL |     swap(mac!(refmut), mac!(refmut));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: this is a mutable reference to a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:49:10
   |
LL |     swap(mac!(refmut), mac!(refmut));
   |          ^^^^^^^^^^^^
note: this is a mutable reference to a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:49:24
   |
LL |     swap(mac!(refmut), mac!(refmut));
   |                        ^^^^^^^^^^^^

error: swapping with a temporary value is inefficient
  --> tests/ui/swap_with_temporary_unfixable.rs:51:5
   |
LL |     swap(mac!(refmut y), mac!(refmut));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: this is a mutable reference to a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:51:26
   |
LL |     swap(mac!(refmut y), mac!(refmut));
   |                          ^^^^^^^^^^^^

error: swapping temporary values has no effect
  --> tests/ui/swap_with_temporary_unfixable.rs:57:5
   |
LL |     std::mem::swap(&mut v1.last_mut().unwrap(), &mut v2.last_mut().unwrap());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: this expression returns a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:57:25
   |
LL |     std::mem::swap(&mut v1.last_mut().unwrap(), &mut v2.last_mut().unwrap());
   |                         ^^^^^^^^^^^^^^^^^^^^^^
note: this expression returns a temporary value
  --> tests/ui/swap_with_temporary_unfixable.rs:57:54
   |
LL |     std::mem::swap(&mut v1.last_mut().unwrap(), &mut v2.last_mut().unwrap());
   |                                                      ^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 8 previous errors