src/test/ui/issues/issue-22034.stderr

   1 error[E0277]: expected a `Fn<()>` closure, found `()`
   2   --> $DIR/issue-22034.rs:8:16
   3    |
   4 LL |         &mut *(ptr as *mut dyn Fn())
   5    |                ^^^ expected an `Fn<()>` closure, found `()`
   6    |
   7    = help: the trait `Fn<()>` is not implemented for `()`
   8    = note: wrap the `()` in a closure with no arguments: `|| { /* code */ }`
   9    = note: required for the cast from `()` to the object type `dyn Fn()`
  10
  11 error: aborting due to previous error
  12
  13 For more information about this error, try `rustc --explain E0277`.