error[E0596]: cannot borrow immutable item `**t` as mutable --> $DIR/trivial-bounds-inconsistent-copy-reborrow.rs:16:5 | LL | fn reborrow_mut<'a>(t: &'a &'a mut i32) -> &'a mut i32 where &'a mut i32: Copy { | --------------- help: consider changing this to be a mutable reference: `&mut &mut i32` LL | *t //~ ERROR | ^^ `t` is a `&` reference, so the data it refers to cannot be borrowed as mutable error[E0596]: cannot borrow immutable item `**t` as mutable --> $DIR/trivial-bounds-inconsistent-copy-reborrow.rs:20:6 | LL | fn copy_reborrow_mut<'a>(t: &'a &'a mut i32) -> &'a mut i32 where &'a mut i32: Copy { | --------------- help: consider changing this to be a mutable reference: `&mut &mut i32` LL | {*t} //~ ERROR | ^^ `t` is a `&` reference, so the data it refers to cannot be borrowed as mutable error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0596`.