error[E0596]: cannot borrow `**t` as mutable, as it is behind a `&` reference --> $DIR/trivial-bounds-inconsistent-copy-reborrow.rs:6:5 | LL | *t | ^^ `t` is a `&` reference, so the data it refers to cannot be borrowed as mutable | help: consider changing this to be a mutable reference | LL | fn reborrow_mut<'a>(t: &'a mut &'a mut i32) -> &'a mut i32 where &'a mut i32: Copy { | +++ error[E0596]: cannot borrow `**t` as mutable, as it is behind a `&` reference --> $DIR/trivial-bounds-inconsistent-copy-reborrow.rs:10:6 | LL | {*t} | ^^ `t` is a `&` reference, so the data it refers to cannot be borrowed as mutable | help: consider changing this to be a mutable reference | LL | fn copy_reborrow_mut<'a>(t: &'a mut &'a mut i32) -> &'a mut i32 where &'a mut i32: Copy { | +++ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0596`.