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