error[E0308]: mismatched types --> tests/ui-nightly/transmute-mut-src-not-a-reference.rs:17:53 | 17 | const SRC_NOT_A_REFERENCE: &mut u8 = transmute_mut!(0usize); | ---------------^^^^^^- | | | | | expected `&mut _`, found `usize` | expected due to this | = note: expected mutable reference `&mut _` found type `usize` help: consider mutably borrowing here | 17 | const SRC_NOT_A_REFERENCE: &mut u8 = transmute_mut!(&mut 0usize); | ++++