= help: the trait `std::marker::Sized` is not implemented for `T`
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
= help: consider adding a `where T: std::marker::Sized` bound
- = note: only the last field of a struct may have a dynamically sized type
+ = note: the last field of a packed struct may only have a dynamically sized type if it does not need drop to be run
error: aborting due to previous error