error[E0277]: the type `UnsafeCell<mlua::lua::ExtraData>` may contain interior mutability and a reference may not be safely transferrable across a catch_unwind boundary
 --> tests/compile/ref_nounwindsafe.rs:8:18
  |
8 |     catch_unwind(move || table.set("a", "b").unwrap());
  |     ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `UnsafeCell<mlua::lua::ExtraData>` may contain interior mutability and a reference may not be safely transferrable across a catch_unwind boundary
  |     |
  |     required by a bound introduced by this call
  |
  = help: within `Lua`, the trait `RefUnwindSafe` is not implemented for `UnsafeCell<mlua::lua::ExtraData>`
  = note: required because it appears within the type `ArcInner<UnsafeCell<ExtraData>>`
  = note: required because it appears within the type `PhantomData<ArcInner<UnsafeCell<ExtraData>>>`
  = note: required because it appears within the type `Arc<UnsafeCell<ExtraData>>`
  = note: required because it appears within the type `LuaInner`
  = note: required because it appears within the type `ArcInner<LuaInner>`
  = note: required because it appears within the type `PhantomData<ArcInner<LuaInner>>`
  = note: required because it appears within the type `Arc<LuaInner>`
  = note: required because it appears within the type `Lua`
  = note: required for `&Lua` to implement `UnwindSafe`
  = note: required because it appears within the type `LuaRef<'_>`
  = note: required because it appears within the type `Table<'_>`
note: required because it's used within this closure
 --> tests/compile/ref_nounwindsafe.rs:8:18
  |
8 |     catch_unwind(move || table.set("a", "b").unwrap());
  |                  ^^^^^^^
note: required by a bound in `catch_unwind`
 --> $RUST/std/src/panic.rs
  |
  | pub fn catch_unwind<F: FnOnce() -> R + UnwindSafe, R>(f: F) -> Result<R> {
  |                                        ^^^^^^^^^^ required by this bound in `catch_unwind`