mirror of https://github.com/rust-lang/rust
78 lines
2.7 KiB
Plaintext
78 lines
2.7 KiB
Plaintext
warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
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--> $DIR/equality2.rs:1:12
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LL | #![feature(specialization)]
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| ^^^^^^^^^^^^^^
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= note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
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= help: consider using `min_specialization` instead, which is more stable and complete
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= note: `#[warn(incomplete_features)]` on by default
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error[E0308]: mismatched types
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--> $DIR/equality2.rs:25:18
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LL | fn hide<T: Foo>(x: T) -> impl Foo {
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| -------- the found opaque type
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...
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LL | let _: u32 = hide(0_u32);
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| --- ^^^^^^^^^^^ expected `u32`, found opaque type
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| |
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| expected due to this
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= note: expected type `u32`
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found opaque type `impl Foo`
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error[E0308]: mismatched types
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--> $DIR/equality2.rs:31:18
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LL | fn hide<T: Foo>(x: T) -> impl Foo {
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| -------- the found opaque type
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...
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LL | let _: i32 = Leak::leak(hide(0_i32));
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| --- ^^^^^^^^^^^^^^^^^^^^^^^ expected `i32`, found associated type
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| |
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| expected due to this
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= note: expected type `i32`
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found associated type `<impl Foo as Leak>::T`
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help: consider constraining the associated type `<impl Foo as Leak>::T` to `i32`
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LL | fn hide<T: Foo>(x: T) -> impl Foo<T = i32> {
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| +++++++++
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error[E0308]: mismatched types
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--> $DIR/equality2.rs:38:10
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LL | fn hide<T: Foo>(x: T) -> impl Foo {
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| --------
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| |
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| the expected opaque type
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| the found opaque type
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...
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LL | x = (x.1,
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| ^^^ expected `u32`, found `i32`
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= note: expected opaque type `impl Foo` (`u32`)
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found opaque type `impl Foo` (`i32`)
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= note: distinct uses of `impl Trait` result in different opaque types
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error[E0308]: mismatched types
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--> $DIR/equality2.rs:41:10
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LL | fn hide<T: Foo>(x: T) -> impl Foo {
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| --------
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| |
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| the expected opaque type
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| the found opaque type
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...
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LL | x.0);
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| ^^^ expected `i32`, found `u32`
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= note: expected opaque type `impl Foo` (`i32`)
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found opaque type `impl Foo` (`u32`)
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= note: distinct uses of `impl Trait` result in different opaque types
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error: aborting due to 4 previous errors; 1 warning emitted
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For more information about this error, try `rustc --explain E0308`.
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