error[E0277]: `u8` cannot be safely transmuted into `bool` in the defining scope of `assert::Context` --> $DIR/bool-mut.rs:16:50 | LL | assert::is_transmutable::<&'static mut bool, &'static mut u8>() | ^^^^^^^^^^^^^^^ At least one value of `u8` isn't a bit-valid value of `bool` | note: required by a bound in `is_transmutable` --> $DIR/bool-mut.rs:11:14 | LL | pub fn is_transmutable() | --------------- required by a bound in this function LL | where LL | Dst: BikeshedIntrinsicFrom | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_transmutable` error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.