error[E0512]: cannot transmute between types of different sizes, or dependently-sized types --> $DIR/issue-28625.rs:12:14 | LL | unsafe { std::mem::transmute(a) } | ^^^^^^^^^^^^^^^^^^^ | = note: source type: `&ArrayPeano` (N bits) = note: target type: `&[T]` (N bits) error: aborting due to previous error For more information about this error, try `rustc --explain E0512`.