error[E0277]: `&'static Unit` cannot be safely transmuted into `&'static Unit` in the defining scope of `assert::Context`. --> $DIR/references.rs:26:52 | LL | assert::is_maybe_transmutable::<&'static Unit, &'static Unit>(); | ^^^^^^^^^^^^^ `&'static Unit` cannot be safely transmuted into `&'static Unit` in the defining scope of `assert::Context`. | = help: the trait `BikeshedIntrinsicFrom<&'static Unit, assert::Context, Assume { alignment: true, lifetimes: true, safety: true, validity: true }>` is not implemented for `&'static Unit` note: required by a bound in `is_maybe_transmutable` --> $DIR/references.rs:13:14 | LL | pub fn is_maybe_transmutable() | --------------------- required by a bound in this LL | where LL | Dst: BikeshedIntrinsicFrom | |__________^ required by this bound in `is_maybe_transmutable` error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.