error[E0658]: the target feature `avx512bw` is currently unstable
  --> $DIR/target-feature-gate.rs:30:18
   |
LL | #[target_feature(enable = "avx512bw")]
   |                  ^^^^^^^^^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/44839
   = help: add `#![feature(avx512_target_feature)]` to the crate attributes to enable

error: aborting due to previous error

For more information about this error, try `rustc --explain E0658`.