error: a `const` item should not be interior mutable
  --> tests/ui/crashes/ice-9445.rs:1:1
   |
LL | const UNINIT: core::mem::MaybeUninit<core::cell::Cell<&'static ()>> = core::mem::MaybeUninit::uninit();
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: consider making this `Sync` so that it can go in a static item or using a `thread_local`
   = 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