error[E0658]: SIMD types are experimental and possibly buggy --> $DIR/gated-features-attr-spans.rs:1:1 | LL | #[repr(simd)] | ^^^^^^^^^^^^^ | = note: see issue #27731 for more information = help: add `#![feature(repr_simd)]` to the crate attributes to enable error: aborting due to previous error For more information about this error, try `rustc --explain E0658`.