error[E0723]: mutable references in const fn are unstable (see issue #57563)
  --> $DIR/ranged_ints2_const.rs:11:9
   |
LL |     let y = &mut x.0;
   |         ^
   |
   = help: add #![feature(const_fn)] to the crate attributes to enable

error[E0723]: mutable references in const fn are unstable (see issue #57563)
  --> $DIR/ranged_ints2_const.rs:18:9
   |
LL |     let y = unsafe { &mut x.0 };
   |         ^
   |
   = help: add #![feature(const_fn)] to the crate attributes to enable

error[E0133]: mutation of layout constrained field is unsafe and requires unsafe function or block
  --> $DIR/ranged_ints2_const.rs:11:13
   |
LL |     let y = &mut x.0;
   |             ^^^^^^^^ mutation of layout constrained field
   |
   = note: mutating layout constrained fields cannot statically be checked for valid values

error: aborting due to 3 previous errors

Some errors occurred: E0133, E0723.
For more information about an error, try `rustc --explain E0133`.