1 error[E0599]: no method named `as_deref_mut` found for type `std::option::Option<{integer}>` in the current scope
2 --> $DIR/option-as_deref_mut.rs:4:33
4 LL | let _result = &mut Some(42).as_deref_mut();
5 | ^^^^^^^^^^^^ method not found in `std::option::Option<{integer}>`
7 = note: the method `as_deref_mut` exists but the following trait bounds were not satisfied:
8 `{integer} : std::ops::DerefMut`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0599`.