1 error[E0658]: the `#[fundamental]` attribute is an experimental feature
2 --> $DIR/feature-gate-fundamental.rs:1:1
7 = note: see issue #29635 <https://github.com/rust-lang/rust/issues/29635> for more information
8 = help: add `#![feature(fundamental)]` to the crate attributes to enable
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0658`.