1 error[E0658]: casting pointers to integers in constants is unstable
2 --> $DIR/issue-18294.rs:3:31
4 LL | const Y: usize = unsafe { &X as *const u32 as usize };
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^
7 = note: for more information, see https://github.com/rust-lang/rust/issues/51910
8 = help: add #![feature(const_raw_ptr_to_usize_cast)] to the crate attributes to enable
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0658`.