error[E0308]: mismatched types --> $DIR/issue-71676-2.rs:41:22 | LL | let _: *mut u8 = &a; | ------- ^^ types differ in mutability | | | expected due to this | = note: expected raw pointer `*mut u8` found reference `&Emm` help: consider dereferencing | LL | let _: *mut u8 = &mut ***a; | +++++++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0308`.