error[E0658]: casting pointers to integers in constants is unstable
  --> $DIR/cast-ptr-to-int-const.rs:5:9
   |
LL |         main as u32
   |         ^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/51910
   = help: add `#![feature(const_raw_ptr_to_usize_cast)]` to the crate attributes to enable

error[E0658]: casting pointers to integers in constants is unstable
  --> $DIR/cast-ptr-to-int-const.rs:9:9
   |
LL |         &Y as *const u32 as u32
   |         ^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/51910
   = help: add `#![feature(const_raw_ptr_to_usize_cast)]` to the crate attributes to enable

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0658`.