| error: nonexistent builtin attribute `diagnostic::do_not_recommend` used in `#[doc(attribute = "...")]` | |
| --> $DIR/doc-attribute-unsupported.rs:5:19 | |
| | | |
| LL | #[doc(attribute = "diagnostic::do_not_recommend")] | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
| | | |
| = help: only existing builtin attributes are allowed in core/std | |
| error: aborting due to 1 previous error | |