|  | error[E0308]: mismatched types | 
|  | --> $DIR/issue-5216.rs:3:21 | 
|  | | | 
|  | LL | pub static C: S = S(f); | 
|  | |                   - ^ expected `Box<dyn FnMut() + Sync>`, found fn item | 
|  | |                   | | 
|  | |                   arguments to this struct are incorrect | 
|  | | | 
|  | = note: expected struct `Box<(dyn FnMut() + Sync + 'static)>` | 
|  | found fn item `fn() {f}` | 
|  | note: tuple struct defined here | 
|  | --> $DIR/issue-5216.rs:2:8 | 
|  | | | 
|  | LL | struct S(Box<dyn FnMut() + Sync>); | 
|  | |        ^ | 
|  |  | 
|  | error[E0308]: mismatched types | 
|  | --> $DIR/issue-5216.rs:8:19 | 
|  | | | 
|  | LL | pub static D: T = g; | 
|  | |                   ^ expected `Box<dyn FnMut() + Sync>`, found fn item | 
|  | | | 
|  | = note: expected struct `Box<(dyn FnMut() + Sync + 'static)>` | 
|  | found fn item `fn() {g}` | 
|  |  | 
|  | error: aborting due to 2 previous errors | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0308`. |