warning: to use a constant of type `std::cell::Cell` in a pattern, `std::cell::Cell` must be annotated with `#[derive(PartialEq, Eq)]`
  --> $DIR/issue-55511.rs:16:9
   |
LL |         <() as Foo<'static>>::C => { }
   |         ^^^^^^^^^^^^^^^^^^^^^^^
   |
note: lint level defined here
  --> $DIR/issue-55511.rs:1:9
   |
LL | #![warn(indirect_structural_match)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #62411 <https://github.com/rust-lang/rust/issues/62411>

error[E0597]: `a` does not live long enough
  --> $DIR/issue-55511.rs:13:28
   |
LL |     let b = Some(Cell::new(&a));
   |                            ^^ borrowed value does not live long enough
...
LL |         <() as Foo<'static>>::C => { }
   |         ----------------------- type annotation requires that `a` is borrowed for `'static`
...
LL | }
   | - `a` dropped here while still borrowed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0597`.