error[E0512]: cannot transmute between types of different sizes, or dependently-sized types --> $DIR/issue-32377.rs:15:14 | LL | unsafe { mem::transmute(x) } | ^^^^^^^^^^^^^^ | = note: source type: `[usize; 2]` (N bits) = note: target type: `Bar` (N bits) error: aborting due to previous error For more information about this error, try `rustc --explain E0512`.