error: any use of this value will cause an error
  --> $DIR/dangling_raw_ptr.rs:3:1
   |
LL | / const FOO: *const u32 = { //~ ERROR any use of this value will cause an error
LL | |     let x = 42;
LL | |     &x
LL | | };
   | |__^ type validation failed: encountered dangling pointer in final constant
   |
   = note: #[deny(const_err)] on by default

error: aborting due to previous error