1 error[E0658]: the `#[profiler_runtime]` attribute is used to identify the `profiler_builtins` crate which contains the profiler runtime and will never be stable
2 --> $DIR/feature-gate-profiler-runtime.rs:1:1
4 LL | #![profiler_runtime]
7 = help: add `#![feature(profiler_runtime)]` to the crate attributes to enable
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0658`.