error: a `const` item should never be interior mutable
  --> $DIR/ice-9445.rs:1:1
   |
LL | const UNINIT: core::mem::MaybeUninit<core::cell::Cell<&'static ()>> = core::mem::MaybeUninit::uninit();
   | -----^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   | |
   | make this a static item (maybe with lazy_static)
   |
   = note: `-D clippy::declare-interior-mutable-const` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::declare_interior_mutable_const)]`

error: aborting due to 1 previous error