1 error[E0277]: the size for values of type `T` cannot be known at compilation time
2 --> $DIR/union-sized-field.rs:4:5
4 LL | union Foo<T: ?Sized> {
5 | - this type parameter needs to be `std::marker::Sized`
7 | ^^^^^^^^ doesn't have a size known at compile-time
9 = help: the trait `std::marker::Sized` is not implemented for `T`
10 = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
11 = note: no field of a union may have a dynamically sized type
13 error[E0277]: the size for values of type `T` cannot be known at compilation time
14 --> $DIR/union-sized-field.rs:9:5
16 LL | struct Foo2<T: ?Sized> {
17 | - this type parameter needs to be `std::marker::Sized`
19 | ^^^^^^^^ doesn't have a size known at compile-time
21 = help: the trait `std::marker::Sized` is not implemented for `T`
22 = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
23 = note: only the last field of a struct may have a dynamically sized type
25 error[E0277]: the size for values of type `T` cannot be known at compilation time
26 --> $DIR/union-sized-field.rs:15:11
28 LL | enum Foo3<T: ?Sized> {
29 | - this type parameter needs to be `std::marker::Sized`
31 | ^ doesn't have a size known at compile-time
33 = help: the trait `std::marker::Sized` is not implemented for `T`
34 = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
35 = note: no field of an enum variant may have a dynamically sized type
37 error: aborting due to 3 previous errors
39 For more information about this error, try `rustc --explain E0277`.