error[E0046]: not all trait items implemented, missing: `Target` --> $DIR/issue-24356.rs:18:9 | LL | impl Deref for Thing { | ^^^^^^^^^^^^^^^^^^^^ missing `Target` in implementation | = help: implement the missing item: `type Target = /* Type */;` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0046`.