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error[E0277]: the size for values of type `dyn for<'r> Fn(&'r isize) -> isize` cannot be known at compilation time
--> $DIR/issue-18919.rs:3:15
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LL | fn ho_func(f: Option<FuncType>) {
| ^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `dyn for<'r> Fn(&'r isize) -> isize`
note: required by a bound in `Option`
--> $DIR/issue-18919.rs:7:13
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LL | enum Option<T> {
| ^ required by this bound in `Option`
help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
--> $DIR/issue-18919.rs:7:13
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LL | enum Option<T> {
| ^ this could be changed to `T: ?Sized`...
LL | Some(T),
| - ...if indirection were used here: `Box<T>`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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