error[E0594]: cannot assign to `*x`, which is behind a `&` reference --> $DIR/issue-57989.rs:5:5 | LL | *x = 0; | ^^^^^^ `x` is a `&` reference, so the data it refers to cannot be written | help: consider changing this to be a mutable reference | LL | fn f(x: &mut i32) { | ~~~~~~~~ error[E0506]: cannot assign to `*x` because it is borrowed --> $DIR/issue-57989.rs:5:5 | LL | let g = &x; | -- `*x` is borrowed here LL | *x = 0; | ^^^^^^ `*x` is assigned to here but it was already borrowed LL | LL | g; | - borrow later used here error: aborting due to 2 previous errors Some errors have detailed explanations: E0506, E0594. For more information about an error, try `rustc --explain E0506`.