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error[E0308]: mismatched types
--> $DIR/static-reference-to-fn-1.rs:17:15
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LL | func: &foo,
| ^^^^ expected `&fn() -> Option<isize>`, found `&fn() -> Option<isize> {foo}`
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= note: expected reference `&fn() -> Option<isize>`
found reference `&fn() -> Option<isize> {foo}`
= note: fn items are distinct from fn pointers
= note: when the arguments and return types match, functions can be coerced to function pointers
help: consider casting to a fn pointer
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LL | func: &(foo as fn() -> Option<isize>),
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to previous error
For more information about this error, try `rustc --explain E0308`.
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