error[E0658]: references in constants may only refer to immutable values
  --> $DIR/const-multi-ref.rs:6:13
   |
LL |     let p = &mut a;
   |             ^^^^^^ constants require immutable values
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/57349
   = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable

error[E0492]: cannot borrow a constant which may contain interior mutability, create a static instead
  --> $DIR/const-multi-ref.rs:16:13
   |
LL |     let p = &a;
   |             ^^

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0492, E0658.
For more information about an error, try `rustc --explain E0492`.