error[E0658]: the `#[rustc_error]` attribute is just used for rustc unit tests and will never be stable | |
--> $DIR/feature-gate-generic_associated_types_extended.rs:3:1 | |
| | |
LL | #[rustc_error] | |
| ^^^^^^^^^^^^^^ | |
| | |
= help: add `#![feature(rustc_attrs)]` to the crate attributes to enable | |
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | |
error: aborting due to 1 previous error | |
For more information about this error, try `rustc --explain E0658`. |