src/test/ui/consts/min_const_fn/allow_const_fn_ptr.stderr

error[E0723]: function pointers in const fn are unstable
  --> $DIR/allow_const_fn_ptr.rs:4:16
   |
LL | const fn error(_: fn()) {}
   |                ^
   |
   = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
   = help: add `#![feature(const_fn)]` to the crate attributes to enable

error: aborting due to previous error

For more information about this error, try `rustc --explain E0723`.