| error[E0277]: the type `std::cell::UnsafeCell<i32>` may contain interior mutability and a reference may not be safely transferrable across a catch_unwind boundary |
| --> $DIR/interior-mutability.rs:5:5 |
| | |
| LL | catch_unwind(|| { x.set(23); }); |
| | ^^^^^^^^^^^^ `std::cell::UnsafeCell<i32>` may contain interior mutability and a reference may not be safely transferrable across a catch_unwind boundary |
| | |
| = help: within `std::cell::Cell<i32>`, the trait `std::panic::RefUnwindSafe` is not implemented for `std::cell::UnsafeCell<i32>` |
| = note: required because it appears within the type `std::cell::Cell<i32>` |
| = note: required because of the requirements on the impl of `std::panic::UnwindSafe` for `&std::cell::Cell<i32>` |
| = note: required because it appears within the type `[closure@$DIR/interior-mutability.rs:5:18: 5:35 x:&std::cell::Cell<i32>]` |
| = note: required by `std::panic::catch_unwind` |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0277`. |