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error[E0599]: the method `as_deref_mut` exists for enum `Option<{integer}>`, but its trait bounds were not satisfied
--> $DIR/option-as_deref_mut.rs:2:33
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LL | let _result = &mut Some(42).as_deref_mut();
| ^^^^^^^^^^^^
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= note: the following trait bounds were not satisfied:
`{integer}: Deref`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0599`.
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