warning: mutable reference of mutable static is discouraged
  --> $DIR/borrowck-unsafe-static-mutable-borrows.rs:19:30
   |
LL |         let sfoo: *mut Foo = &mut SFOO;
   |                              ^^^^^^^^^ mutable reference of mutable static
   |
   = note: for more information, see issue #114447 <https://github.com/rust-lang/rust/issues/114447>
   = note: reference of mutable static is a hard error from 2024 edition
   = note: mutable statics can be written to by multiple threads: aliasing violations or data races will cause undefined behavior
   = note: `#[warn(static_mut_ref)]` on by default
help: mutable references are dangerous since if there's any other pointer or reference used for that static while the reference lives, that's UB; use `addr_of_mut!` instead to create a raw pointer
   |
LL |         let sfoo: *mut Foo = addr_of_mut!(SFOO);
   |                              ~~~~~~~~~~~~~~~~~~

warning: 1 warning emitted