| error[E0658]: SIMD types are experimental and possibly buggy | 
 |   --> $DIR/feature-gate-repr-simd.rs:1:1 | 
 |    | | 
 | LL | #[repr(simd)] | 
 |    | ^^^^^^^^^^^^^ | 
 |    | | 
 |    = note: see issue #27731 <https://github.com/rust-lang/rust/issues/27731> for more information | 
 |    = help: add `#![feature(repr_simd)]` 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 |    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 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[E0658]: SIMD types are experimental and possibly buggy | 
 |   --> $DIR/feature-gate-repr-simd.rs:6:1 | 
 |    | | 
 | LL | #[repr(simd)] | 
 |    | ^^^^^^^^^^^^^ | 
 |    | | 
 |    = note: see issue #27731 <https://github.com/rust-lang/rust/issues/27731> for more information | 
 |    = help: add `#![feature(repr_simd)]` 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 |    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 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[E0658]: SIMD types are experimental and possibly buggy | 
 |   --> $DIR/feature-gate-repr-simd.rs:9:1 | 
 |    | | 
 | LL | #[repr(simd)] | 
 |    | ^^^^^^^^^^^^^ | 
 |    | | 
 |    = note: see issue #27731 <https://github.com/rust-lang/rust/issues/27731> for more information | 
 |    = help: add `#![feature(repr_simd)]` 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 |    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 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[E0658]: SIMD types are experimental and possibly buggy | 
 |   --> $DIR/feature-gate-repr-simd.rs:13:1 | 
 |    | | 
 | LL | #[repr(simd)] | 
 |    | ^^^^^^^^^^^^^ | 
 |    | | 
 |    = note: see issue #27731 <https://github.com/rust-lang/rust/issues/27731> for more information | 
 |    = help: add `#![feature(repr_simd)]` 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 |    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 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[E0566]: conflicting representation hints | 
 |   --> $DIR/feature-gate-repr-simd.rs:4:8 | 
 |    | | 
 | LL | #[repr(C)] | 
 |    |        ^ | 
 | LL | | 
 | LL | #[repr(simd)] | 
 |    |        ^^^^ | 
 |    | | 
 |    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! | 
 |    = note: for more information, see issue #68585 <https://github.com/rust-lang/rust/issues/68585> | 
 |    = note: `#[deny(conflicting_repr_hints)]` (part of `#[deny(future_incompatible)]`) on by default | 
 |  | 
 | error[E0517]: attribute should be applied to a struct | 
 |   --> $DIR/feature-gate-repr-simd.rs:9:8 | 
 |    | | 
 | LL | #[repr(simd)] | 
 |    |        ^^^^ | 
 | LL | | 
 | LL | union U {f: u32} | 
 |    | ---------------- not a struct | 
 |  | 
 | error[E0517]: attribute should be applied to a struct | 
 |   --> $DIR/feature-gate-repr-simd.rs:13:8 | 
 |    | | 
 | LL | #[repr(simd)] | 
 |    |        ^^^^ | 
 | LL | | 
 | LL | enum E { X } | 
 |    | ------------ not a struct | 
 |  | 
 | error: aborting due to 7 previous errors | 
 |  | 
 | Some errors have detailed explanations: E0517, E0566, E0658. | 
 | For more information about an error, try `rustc --explain E0517`. | 
 | Future incompatibility report: Future breakage diagnostic: | 
 | error[E0566]: conflicting representation hints | 
 |   --> $DIR/feature-gate-repr-simd.rs:4:8 | 
 |    | | 
 | LL | #[repr(C)] | 
 |    |        ^ | 
 | LL | | 
 | LL | #[repr(simd)] | 
 |    |        ^^^^ | 
 |    | | 
 |    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! | 
 |    = note: for more information, see issue #68585 <https://github.com/rust-lang/rust/issues/68585> | 
 |    = note: `#[deny(conflicting_repr_hints)]` (part of `#[deny(future_incompatible)]`) on by default | 
 |  |