|  | warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes | 
|  | --> $DIR/specialization-overlap-projection.rs:4:12 | 
|  | | | 
|  | 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[E0119]: conflicting implementations of trait `Foo` for type `u32` | 
|  | --> $DIR/specialization-overlap-projection.rs:20:1 | 
|  | | | 
|  | LL | impl Foo for u32 {} | 
|  | | ---------------- first implementation here | 
|  | LL | impl Foo for <u8 as Assoc>::Output {} | 
|  | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `u32` | 
|  |  | 
|  | error[E0119]: conflicting implementations of trait `Foo` for type `u32` | 
|  | --> $DIR/specialization-overlap-projection.rs:22:1 | 
|  | | | 
|  | LL | impl Foo for u32 {} | 
|  | | ---------------- first implementation here | 
|  | ... | 
|  | LL | impl Foo for <u16 as Assoc>::Output {} | 
|  | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `u32` | 
|  |  | 
|  | error: aborting due to 2 previous errors; 1 warning emitted | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0119`. |