1 error[E0277]: the size for values of type `(dyn A + 'static)` cannot be known at compilation time
2 --> $DIR/issue-5883.rs:7:15
4 LL | fn new_struct(r: dyn A + 'static)
5 | ^ doesn't have a size known at compile-time
7 = help: the trait `Sized` is not implemented for `(dyn A + 'static)`
8 = help: unsized fn params are gated as an unstable feature
9 help: function arguments must have a statically known size, borrowed types always have a known size
11 LL | fn new_struct(&r: dyn A + 'static)
14 error[E0277]: the size for values of type `(dyn A + 'static)` cannot be known at compilation time
15 --> $DIR/issue-5883.rs:8:8
18 | ^^^^^^ doesn't have a size known at compile-time
21 | --------------- this returned value is of type `Struct`
23 = help: within `Struct`, the trait `Sized` is not implemented for `(dyn A + 'static)`
24 = note: required because it appears within the type `Struct`
25 = note: the return type of a function must have a statically known size
27 error: aborting due to 2 previous errors
29 For more information about this error, try `rustc --explain E0277`.