| error[E0658]: unless otherwise specified, attributes with the prefix `rustc_` are reserved for internal compiler diagnostics (see issue #29642) | |
| --> $DIR/feature-gate-rustc-attrs.rs:15:1 | |
| | | |
| LL | #[rustc_foo] | |
| | ^^^^^^^^^^^^ | |
| | | |
| = help: add #![feature(rustc_attrs)] to the crate attributes to enable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0658`. |