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1 error[E0271]: expected `[closure@$DIR/fallback-closure-wrap.rs:18:40: 18:47]` to be a closure that returns `()`, but it returns `!`
2   --> $DIR/fallback-closure-wrap.rs:18:31
3    |
4 LL |       let error = Closure::wrap(Box::new(move || {
5    |  _______________________________^
6 LL | |
7 LL | |         panic!("Can't connect to server.");
8 LL | |     }) as Box<dyn FnMut()>);
9    | |______^ expected `()`, found `!`
10    |
11    = note: expected unit type `()`
12                    found type `!`
13    = note: required for the cast from `[closure@$DIR/fallback-closure-wrap.rs:18:40: 18:47]` to the object type `dyn FnMut()`
14
15 error: aborting due to previous error
16
17 For more information about this error, try `rustc --explain E0271`.