error[E0308]: mismatched types --> tests/ui-msrv/transmute-mut-src-immutable.rs:17:37 | 17 | let _: &mut u8 = transmute_mut!(&0u8); | ---------------^^^^- | | | | | types differ in mutability | expected due to this | = note: expected mutable reference `&mut _` found reference `&u8`