| error[E0277]: the size for values of type `X` cannot be known at compilation time |
| --> $DIR/unsized7.rs:22:21 |
| | |
| LL | impl<X: ?Sized + T> T1<X> for S3<X> { |
| | ^^^^^ doesn't have a size known at compile-time |
| | |
| = help: the trait `std::marker::Sized` is not implemented for `X` |
| = 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 X: std::marker::Sized` bound |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0277`. |
