error[E0512]: transmute called with types of different sizes --> $DIR/issue-32377.rs:25:14 | 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`.