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warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
  --> $DIR/specialization-transmute.rs:3:12
   |
LL | #![feature(specialization)]
   |            ^^^^^^^^^^^^^^
   |
   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
   = help: consider using `min_specialization` instead, which is more stable and complete
   = note: `#[warn(incomplete_features)]` on by default

error[E0284]: type annotations needed: cannot satisfy `<T as Default>::Id normalizes-to _`
  --> $DIR/specialization-transmute.rs:15:23
   |
LL |     fn intu(&self) -> &Self::Id {
   |                       ^^^^^^^^^ cannot satisfy `<T as Default>::Id normalizes-to _`

error[E0282]: type annotations needed
  --> $DIR/specialization-transmute.rs:13:23
   |
LL |     default type Id = T;
   |                       ^ cannot infer type for associated type `<T as Default>::Id`

error: aborting due to 2 previous errors; 1 warning emitted

Some errors have detailed explanations: E0282, E0284.
For more information about an error, try `rustc --explain E0282`.