error[E0658]: dereferencing raw pointers in constants is unstable
  --> $DIR/E0396.rs:5:28
   |
LL | const VALUE: u8 = unsafe { *REG_ADDR };
   |                            ^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/51911
   = help: add `#![feature(const_raw_ptr_deref)]` to the crate attributes to enable

error: aborting due to previous error

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