| error[E0658]: the `#[marker]` attribute is an experimental feature | |
| --> $DIR/feature-gate-marker_trait_attr.rs:3:1 | |
| | | |
| LL | #[marker] trait ExplicitMarker {} | |
| | ^^^^^^^^^ | |
| | | |
| = note: see issue #29864 <https://github.com/rust-lang/rust/issues/29864> for more information | |
| = help: add `#![feature(marker_trait_attr)]` to the crate attributes to enable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0658`. |