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