error: any use of this value will cause an error
  --> $DIR/ref_to_int_match.rs:25:27
   |
LL | const BAR: Int = unsafe { Foo { r: &42 }.f };
   | --------------            ^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes
   |
   = note: `#[deny(const_err)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
   = help: this code performed an operation that depends on the underlying bytes representing a pointer
   = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported

error: could not evaluate constant pattern
  --> $DIR/ref_to_int_match.rs:7:14
   |
LL |         10..=BAR => {},
   |              ^^^

error: could not evaluate constant pattern
  --> $DIR/ref_to_int_match.rs:7:14
   |
LL |         10..=BAR => {},
   |              ^^^

error: aborting due to 3 previous errors

Future incompatibility report: Future breakage diagnostic:
error: any use of this value will cause an error
  --> $DIR/ref_to_int_match.rs:25:27
   |
LL | const BAR: Int = unsafe { Foo { r: &42 }.f };
   | --------------            ^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes
   |
   = note: `#[deny(const_err)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
   = help: this code performed an operation that depends on the underlying bytes representing a pointer
   = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported