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error[E0277]: the size for values of type `(dyn Fn() + 'static)` cannot be known at compilation time
  --> $DIR/issue-23281.rs:4:27
   |
LL |     pub fn function(funs: Vec<dyn Fn() -> ()>) {}
   |                           ^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `(dyn Fn() + 'static)`
note: required by a bound in `Vec`
  --> $DIR/issue-23281.rs:8:12
   |
LL | struct Vec<T> {
   |            ^ required by this bound in `Vec`
help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
  --> $DIR/issue-23281.rs:8:12
   |
LL | struct Vec<T> {
   |            ^ this could be changed to `T: ?Sized`...
LL |     t: T,
   |        - ...if indirection were used here: `Box<T>`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0277`.