error[E0658]: `while` is not allowed in a `const`
  --> $DIR/issue-52475.rs:5:9
   |
LL | /         while n < 5 {
LL | |
LL | |             n = (n + 1) % 5;
LL | |             x = &0; // Materialize a new AllocId
LL | |         }
   | |_________^
   |
   = note: see issue #52000 <https://github.com/rust-lang/rust/issues/52000> for more information
   = help: add `#![feature(const_loop)]` to the crate attributes to enable
   = help: add `#![feature(const_if_match)]` to the crate attributes to enable

error[E0080]: evaluation of constant value failed
  --> $DIR/issue-52475.rs:7:17
   |
LL |             n = (n + 1) % 5;
   |                 ^^^^^^^^^^^ exceeded interpreter step limit (see `#[const_eval_limit]`)

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0080, E0658.
For more information about an error, try `rustc --explain E0080`.