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:8:10 | |
| | |
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`. |