1 error[E0308]: mismatched types
2 --> $DIR/issue-11515.rs:9:33
4 LL | let test = box Test { func: closure };
5 | ^^^^^^^ expected trait `FnMut`, found trait `Fn`
7 = note: expected struct `Box<(dyn FnMut() + 'static)>`
8 found struct `Box<(dyn Fn() + 'static)>`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.