warning: creating a mutable reference to mutable static is discouraged
  --> $DIR/borrowck-access-permissions.rs:18:23
   |
LL |             let _y2 = &mut static_x_mut;
   |                       ^^^^^^^^^^^^^^^^^ mutable reference to mutable static
   |
   = note: for more information, see issue #114447 <https://github.com/rust-lang/rust/issues/114447>
   = note: this will be a hard error in the 2024 edition
   = note: this mutable reference has lifetime `'static`, but if the static gets accessed (read or written) by any other means, or any other reference is created, then any further use of this mutable reference is Undefined Behavior
   = note: `#[warn(static_mut_refs)]` on by default
help: use `addr_of_mut!` instead to create a raw pointer
   |
LL |             let _y2 = addr_of_mut!(static_x_mut);
   |                       ~~~~~~~~~~~~~~~~~~~~~~~~~~

error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
  --> $DIR/borrowck-access-permissions.rs:10:19
   |
LL |         let _y1 = &mut x;
   |                   ^^^^^^ cannot borrow as mutable
   |
help: consider changing this to be mutable
   |
LL |     let mut x = 1;
   |         +++

error[E0596]: cannot borrow immutable static item `static_x` as mutable
  --> $DIR/borrowck-access-permissions.rs:16:19
   |
LL |         let _y1 = &mut static_x;
   |                   ^^^^^^^^^^^^^ cannot borrow as mutable

error[E0596]: cannot borrow `*box_x` as mutable, as `box_x` is not declared as mutable
  --> $DIR/borrowck-access-permissions.rs:28:19
   |
LL |         let _y1 = &mut *box_x;
   |                   ^^^^^^^^^^^ cannot borrow as mutable
   |
help: consider changing this to be mutable
   |
LL |         let mut box_x = Box::new(1);
   |             +++

error[E0596]: cannot borrow `*ref_x` as mutable, as it is behind a `&` reference
  --> $DIR/borrowck-access-permissions.rs:37:19
   |
LL |         let _y1 = &mut *ref_x;
   |                   ^^^^^^^^^^^ `ref_x` is a `&` reference, so the data it refers to cannot be borrowed as mutable
   |
help: consider changing this to be a mutable reference
   |
LL |         let ref_x = &mut x;
   |                      +++

error[E0596]: cannot borrow `*ptr_x` as mutable, as it is behind a `*const` pointer
  --> $DIR/borrowck-access-permissions.rs:47:23
   |
LL |             let _y1 = &mut *ptr_x;
   |                       ^^^^^^^^^^^ `ptr_x` is a `*const` pointer, so the data it refers to cannot be borrowed as mutable
   |
help: consider changing this to be a mutable pointer
   |
LL |         let ptr_x: *const _ = &mut x;
   |                                +++

error[E0596]: cannot borrow `*foo_ref.f` as mutable, as it is behind a `&` reference
  --> $DIR/borrowck-access-permissions.rs:60:18
   |
LL |         let _y = &mut *foo_ref.f;
   |                  ^^^^^^^^^^^^^^^ `foo_ref` is a `&` reference, so the data it refers to cannot be borrowed as mutable
   |
help: consider changing this to be a mutable reference
   |
LL |         let foo_ref = &mut foo;
   |                        +++

error: aborting due to 6 previous errors; 1 warning emitted

For more information about this error, try `rustc --explain E0596`.