| error[E0658]: use of unstable library feature 'core_intrinsics': intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library | |
| --> $DIR/expand-to-unstable.rs:18:10 | |
| | | |
| LL | #[derive(Unstable)] | |
| | ^^^^^^^^ | |
| | | |
| = help: add #![feature(core_intrinsics)] to the crate attributes to enable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0658`. |