| error[E0599]: no method named `as_deref_mut_err` found for type `std::result::Result<_, {integer}>` in the current scope |
| --> $DIR/result-as_deref_mut_err.rs:4:32 |
| | |
| LL | let _result = &mut Err(41).as_deref_mut_err(); |
| | ^^^^^^^^^^^^^^^^ help: there is a method with a similar name: `as_deref_mut_ok` |
| | |
| = note: the method `as_deref_mut_err` exists but the following trait bounds were not satisfied: |
| `{integer} : std::ops::DerefMut` |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0599`. |
