| error[E0751]: found both positive and negative implementation of trait `DerefMut` for type `&MyType<'_>`: | |
| --> $DIR/pin-unsound-issue-66544-derefmut.rs:12:1 | |
| | | |
| LL | impl<'a> DerefMut for &'a MyType<'a> { | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ positive implementation here | |
| | | |
| = note: negative implementation in crate `core` | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0751`. |