src/test/ui/unsized/unsized-inherent-impl-self-type.stderr

   1 error[E0277]: the size for values of type `X` cannot be known at compilation time
   2   --> $DIR/unsized-inherent-impl-self-type.rs:7:17
   3    |
   4 LL | struct S5<Y>(Y);
   5    | ---------------- required by `S5`
   6 LL |
   7 LL | impl<X: ?Sized> S5<X> {
   8    |      -          ^^^^^ doesn't have a size known at compile-time
   9    |      |
  10    |      this type parameter needs to be `std::marker::Sized`
  11    |
  12    = help: the trait `std::marker::Sized` is not implemented for `X`
  13    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
  14
  15 error: aborting due to previous error
  16
  17 For more information about this error, try `rustc --explain E0277`.