src/test/ui/bad/bad-sized.stderr

   1 error[E0225]: only auto traits can be used as additional traits in a trait object
   2   --> $DIR/bad-sized.rs:4:28
   3    |
   4 LL |     let x: Vec<dyn Trait + Sized> = Vec::new();
   5    |                    -----   ^^^^^
   6    |                    |       |
   7    |                    |       additional non-auto trait
   8    |                    |       trait alias used in trait object type (additional use)
   9    |                    first non-auto trait
  10    |                    trait alias used in trait object type (first use)
  11
  12 error[E0277]: the size for values of type `dyn Trait` cannot be known at compilation time
  13   --> $DIR/bad-sized.rs:4:12
  14    |
  15 LL |     let x: Vec<dyn Trait + Sized> = Vec::new();
  16    |            ^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
  17    |
  18    = help: the trait `std::marker::Sized` is not implemented for `dyn Trait`
  19    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
  20    = note: required by `std::vec::Vec`
  21
  22 error[E0277]: the size for values of type `dyn Trait` cannot be known at compilation time
  23   --> $DIR/bad-sized.rs:4:37
  24    |
  25 LL |     let x: Vec<dyn Trait + Sized> = Vec::new();
  26    |                                     ^^^^^^^^ doesn't have a size known at compile-time
  27    |
  28    = help: the trait `std::marker::Sized` is not implemented for `dyn Trait`
  29    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
  30    = note: required by `std::vec::Vec::<T>::new`
  31
  32 error: aborting due to 3 previous errors
  33
  34 Some errors have detailed explanations: E0225, E0277.
  35 For more information about an error, try `rustc --explain E0225`.