error[E0080]: evaluation of constant value failed
  --> $DIR/const_fn_ptr_fail2.rs:9:5
   |
LL |     x(y)
   |     ^^^^
   |     |
   |     calling non-const function `double`
   |     inside `bar` at $DIR/const_fn_ptr_fail2.rs:9:5
...
LL | const Y: usize = bar(X, 2); // FIXME: should fail to typeck someday
   |                  --------- inside `Y` at $DIR/const_fn_ptr_fail2.rs:14:18

error[E0080]: evaluation of constant value failed
  --> $DIR/const_fn_ptr_fail2.rs:9:5
   |
LL |     x(y)
   |     ^^^^
   |     |
   |     calling non-const function `double`
   |     inside `bar` at $DIR/const_fn_ptr_fail2.rs:9:5
...
LL | const Z: usize = bar(double, 2); // FIXME: should fail to typeck someday
   |                  -------------- inside `Z` at $DIR/const_fn_ptr_fail2.rs:15:18

warning: skipping const checks
   |
help: skipping check that does not even have a feature gate
  --> $DIR/const_fn_ptr_fail2.rs:9:5
   |
LL |     x(y)
   |     ^^^^

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

For more information about this error, try `rustc --explain E0080`.