| error[E0658]: use of an internal attribute |
| --> $DIR/rustc_must_implement_one_of_gated.rs:1:1 |
| | |
| LL | #[rustc_must_implement_one_of(eq, neq)] |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable |
| = note: the `#[rustc_must_implement_one_of]` attribute is an internal implementation detail that will never be stable |
| = note: the `#[rustc_must_implement_one_of]` attribute is used to change minimal complete definition of a trait. Its syntax and semantics are highly experimental and will be subject to change before stabilization |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0658`. |
