error[E0080]: evaluation of constant value failed
  --> $DIR/const_fn_ptr_fail2.rs:19:16
   |
LL |     assert_eq!(Y, 4);
   |                ^ referenced constant has errors

error[E0080]: evaluation of constant value failed
  --> $DIR/const_fn_ptr_fail2.rs:21:16
   |
LL |     assert_eq!(Z, 4);
   |                ^ referenced constant has errors

warning: skipping const checks
   |
help: skipping check that does not even have a feature gate
  --> $DIR/const_fn_ptr_fail2.rs:12:5
   |
LL |     x(y)
   |     ^^^^

error: aborting due to 2 previous errors; 1 warning emitted

For more information about this error, try `rustc --explain E0080`.
Future incompatibility report: Future breakage diagnostic:
warning: any use of this value will cause an error
  --> $DIR/const_fn_ptr_fail2.rs:12:5
   |
LL |     x(y)
   |     ^^^^
   |     |
   |     calling non-const function `double`
   |     inside `bar` at $DIR/const_fn_ptr_fail2.rs:12:5
   |     inside `Y` at $DIR/const_fn_ptr_fail2.rs:15:18
...
LL | const Y: usize = bar(X, 2); // FIXME: should fail to typeck someday
   | --------------
   |
note: the lint level is defined here
  --> $DIR/const_fn_ptr_fail2.rs:4:10
   |
LL | #![allow(const_err)]
   |          ^^^^^^^^^
   = 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>

Future breakage diagnostic:
warning: any use of this value will cause an error
  --> $DIR/const_fn_ptr_fail2.rs:12:5
   |
LL |     x(y)
   |     ^^^^
   |     |
   |     calling non-const function `double`
   |     inside `bar` at $DIR/const_fn_ptr_fail2.rs:12:5
   |     inside `Z` at $DIR/const_fn_ptr_fail2.rs:16:18
...
LL | const Z: usize = bar(double, 2); // FIXME: should fail to typeck someday
   | --------------
   |
note: the lint level is defined here
  --> $DIR/const_fn_ptr_fail2.rs:4:10
   |
LL | #![allow(const_err)]
   |          ^^^^^^^^^
   = 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>

Future breakage diagnostic:
warning: erroneous constant used
  --> $DIR/const_fn_ptr_fail2.rs:19:5
   |
LL |     assert_eq!(Y, 4);
   |     ^^^^^^^^^^^^^^^^ referenced constant has errors
   |
note: the lint level is defined here
  --> $DIR/const_fn_ptr_fail2.rs:4:10
   |
LL | #![allow(const_err)]
   |          ^^^^^^^^^
   = 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>
   = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)

Future breakage diagnostic:
warning: erroneous constant used
  --> $DIR/const_fn_ptr_fail2.rs:21:5
   |
LL |     assert_eq!(Z, 4);
   |     ^^^^^^^^^^^^^^^^ referenced constant has errors
   |
note: the lint level is defined here
  --> $DIR/const_fn_ptr_fail2.rs:4:10
   |
LL | #![allow(const_err)]
   |          ^^^^^^^^^
   = 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>
   = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)