| error[E0658]: the `#[no_core]` attribute is an experimental feature | |
| --> $DIR/cfg-attr-crate-2.rs:6:21 | |
| | | |
| LL | #![cfg_attr(broken, no_core)] | |
| | ^^^^^^^ | |
| | | |
| = note: see issue #29639 <https://github.com/rust-lang/rust/issues/29639> for more information | |
| = help: add `#![feature(no_core)]` to the crate attributes to enable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0658`. |