1 error[E0308]: mismatched types
2 --> $DIR/issue-40000.rs:6:9
5 | ^^^ one type is more general than the other
7 = note: expected trait object `dyn for<'r> Fn(&'r i32)`
8 found trait object `dyn Fn(&i32)`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.