error: mutable borrow from immutable input(s)
 --> mut_from_ref.rs:9:39
  |
9 |     fn this_wont_hurt_a_bit(&self) -> &mut Foo {
  |                                       ^^^^^^^^
  |
  = note: `-D mut-from-ref` implied by `-D warnings`
note: immutable borrow here
 --> mut_from_ref.rs:9:29
  |
9 |     fn this_wont_hurt_a_bit(&self) -> &mut Foo {
  |                             ^^^^^

error: mutable borrow from immutable input(s)
  --> mut_from_ref.rs:15:25
   |
15 |     fn ouch(x: &Foo) -> &mut Foo;
   |                         ^^^^^^^^
   |
note: immutable borrow here
  --> mut_from_ref.rs:15:16
   |
15 |     fn ouch(x: &Foo) -> &mut Foo;
   |                ^^^^

error: mutable borrow from immutable input(s)
  --> mut_from_ref.rs:24:21
   |
24 | fn fail(x: &u32) -> &mut u16 {
   |                     ^^^^^^^^
   |
note: immutable borrow here
  --> mut_from_ref.rs:24:12
   |
24 | fn fail(x: &u32) -> &mut u16 {
   |            ^^^^

error: mutable borrow from immutable input(s)
  --> mut_from_ref.rs:28:50
   |
28 | fn fail_lifetime<'a>(x: &'a u32, y: &mut u32) -> &'a mut u32 {
   |                                                  ^^^^^^^^^^^
   |
note: immutable borrow here
  --> mut_from_ref.rs:28:25
   |
28 | fn fail_lifetime<'a>(x: &'a u32, y: &mut u32) -> &'a mut u32 {
   |                         ^^^^^^^

error: mutable borrow from immutable input(s)
  --> mut_from_ref.rs:32:67
   |
32 | fn fail_double<'a, 'b>(x: &'a u32, y: &'a u32, z: &'b mut u32) -> &'a mut u32 {
   |                                                                   ^^^^^^^^^^^
   |
note: immutable borrow here
  --> mut_from_ref.rs:32:27
   |
32 | fn fail_double<'a, 'b>(x: &'a u32, y: &'a u32, z: &'b mut u32) -> &'a mut u32 {
   |                           ^^^^^^^     ^^^^^^^

error: aborting due to 5 previous errors


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