1 error[E0277]: the size for values of type `[Box<E>]` cannot be known at compilation time
2 --> $DIR/issue-35988.rs:2:7
5 | ^^^^^^^^ doesn't have a size known at compile-time
7 = help: the trait `Sized` is not implemented for `[Box<E>]`
8 = note: no field of an enum variant may have a dynamically sized type
9 = help: change the field's type to have a statically known size
10 help: borrowed types always have a statically known size
14 help: the `Box` type always has a statically known size and allocates its contents in the heap
16 LL | V(Box<[Box<E>]>),
19 error: aborting due to 1 previous error
21 For more information about this error, try `rustc --explain E0277`.