error[E0308]: mismatched types --> $DIR/old-lub-glb-hr-noteq1.rs:14:14 | LL | _ => y, | ^ one type is more general than the other | = note: expected fn pointer `for<'a, 'b> fn(&'a u8, &'b u8) -> &'a u8` found fn pointer `for<'a> fn(&'a u8, &'a u8) -> &'a u8` error: aborting due to previous error For more information about this error, try `rustc --explain E0308`.