tests/ui/specialization/specialization-default-types.stderr

   1 warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
   2   --> $DIR/specialization-default-types.rs:5:12
   3    |
   4 LL | #![feature(specialization)]
   5    |            ^^^^^^^^^^^^^^
   6    |
   7    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
   8    = help: consider using `min_specialization` instead, which is more stable and complete
   9    = note: `#[warn(incomplete_features)]` on by default
  10
  11 error[E0308]: mismatched types
  12   --> $DIR/specialization-default-types.rs:15:9
  13    |
  14 LL |     default type Output = Box<T>;
  15    |     ----------------------------- expected this associated type
  16 LL |     default fn generate(self) -> Self::Output {
  17    |                                  ------------ expected `<T as Example>::Output` because of return type
  18 LL |         Box::new(self)
  19    |         ^^^^^^^^^^^^^^ expected associated type, found struct `Box`
  20    |
  21    = note: expected associated type `<T as Example>::Output`
  22                        found struct `Box<T>`
  23
  24 error[E0308]: mismatched types
  25   --> $DIR/specialization-default-types.rs:25:5
  26    |
  27 LL | fn trouble<T>(t: T) -> Box<T> {
  28    |                        ------ expected `Box<T>` because of return type
  29 LL |     Example::generate(t)
  30    |     ^^^^^^^^^^^^^^^^^^^^ expected struct `Box`, found associated type
  31    |
  32    = note:       expected struct `Box<T>`
  33            found associated type `<T as Example>::Output`
  34    = help: consider constraining the associated type `<T as Example>::Output` to `Box<T>`
  35    = note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
  36
  37 error: aborting due to 2 previous errors; 1 warning emitted
  38
  39 For more information about this error, try `rustc --explain E0308`.