error[E0594]: cannot assign to `*foo`, which is behind a `&` reference
  --> $DIR/issue-51515.rs:5:5
   |
LL |     *foo = 32;
   |     ^^^^^^^^^ `foo` is a `&` reference, so the data it refers to cannot be written
   |
help: consider changing this to be a mutable reference
   |
LL |     let foo = &mut 16;
   |               ~~~~~~~

error[E0594]: cannot assign to `*bar`, which is behind a `&` reference
  --> $DIR/issue-51515.rs:8:5
   |
LL |     let bar = foo;
   |         --- consider changing this binding's type to be: `&mut i32`
LL |     *bar = 64;
   |     ^^^^^^^^^ `bar` is a `&` reference, so the data it refers to cannot be written

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0594`.