1 error[E0658]: the `#[fundamental]` attribute is an experimental feature (see issue #29635)
2 --> $DIR/feature-gate-fundamental.rs:11:1
4 LL | #[fundamental] //~ ERROR the `#[fundamental]` attribute is an experimental feature
7 = help: add #![feature(fundamental)] to the crate attributes to enable
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0658`.