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warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
--> $DIR/equality.rs:1:12
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LL | #![feature(specialization)]
| ^^^^^^^^^^^^^^
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= note: `#[warn(incomplete_features)]` on by default
= 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
error[E0308]: mismatched types
--> $DIR/equality.rs:15:5
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LL | fn two(x: bool) -> impl Foo {
| -------- expected `i32` because of return type
...
LL | 0_u32
| ^^^^^ expected `i32`, found `u32`
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help: change the type of the numeric literal from `u32` to `i32`
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LL | 0_i32
| ~~~
error[E0277]: cannot add `impl Foo` to `u32`
--> $DIR/equality.rs:24:11
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LL | n + sum_to(n - 1)
| ^ no implementation for `u32 + impl Foo`
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= help: the trait `Add<impl Foo>` is not implemented for `u32`
= help: the following other types implement trait `Add<Rhs>`:
<&'a f32 as Add<f32>>
<&'a f64 as Add<f64>>
<&'a i128 as Add<i128>>
<&'a i16 as Add<i16>>
<&'a i32 as Add<i32>>
<&'a i64 as Add<i64>>
<&'a i8 as Add<i8>>
<&'a isize as Add<isize>>
and 48 others
error: aborting due to 2 previous errors; 1 warning emitted
Some errors have detailed explanations: E0277, E0308.
For more information about an error, try `rustc --explain E0277`.
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