error: unknown `doc` attribute `x` --> $DIR/deny-invalid-doc-attrs.rs:3:8 | LL | #![doc(x)] | ^ | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #82730 note: the lint level is defined here --> $DIR/deny-invalid-doc-attrs.rs:1:9 | LL | #![deny(invalid_doc_attributes)] | ^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to previous error