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error[E0277]: expected a `Fn()` closure, found `()`
--> $DIR/issue-22034.rs:4:16
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LL | &mut *(ptr as *mut dyn Fn())
| ^^^ expected an `Fn()` closure, found `()`
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= help: the trait `Fn()` is not implemented for `()`
= note: wrap the `()` in a closure with no arguments: `|| { /* code */ }`
= note: required for the cast from `*mut ()` to `*mut dyn Fn()`
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.
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