1 error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
2 --> $DIR/issue-49983-see-issue-0.rs:4:30
4 LL | #[allow(unused_imports)] use core::ptr::Unique;
7 = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0658`.