2023-06-23 22:00:08 -05:00
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error[E0053]: method `bar` has an incompatible type for trait
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2023-09-13 11:04:42 -05:00
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--> $DIR/specialization-broken.rs:15:22
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2023-06-23 22:00:08 -05:00
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LL | default impl<U> Foo for U
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2023-10-18 17:10:48 -05:00
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| - found this type parameter
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2023-06-23 22:00:08 -05:00
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...
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LL | fn bar(&self) -> U {
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2024-07-05 15:58:33 -05:00
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| ^ expected associated type, found type parameter `U`
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2023-06-23 22:00:08 -05:00
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note: type in trait
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2023-09-13 11:04:42 -05:00
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--> $DIR/specialization-broken.rs:8:22
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2023-06-23 22:00:08 -05:00
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LL | fn bar(&self) -> impl Sized;
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| ^^^^^^^^^^
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2023-12-07 21:54:41 -06:00
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= note: expected signature `fn(&_) -> impl Sized`
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found signature `fn(&_) -> U`
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2024-07-05 15:58:33 -05:00
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help: change the output type to match the trait
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LL | fn bar(&self) -> impl Sized {
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| ~~~~~~~~~~
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2023-06-23 22:00:08 -05:00
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error: method with return-position `impl Trait` in trait cannot be specialized
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2023-09-13 11:04:42 -05:00
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--> $DIR/specialization-broken.rs:15:5
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2023-06-23 22:00:08 -05:00
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LL | fn bar(&self) -> U {
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| ^^^^^^^^^^^^^^^^^^
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2023-09-13 11:04:42 -05:00
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= note: specialization behaves in inconsistent and surprising ways with return position `impl Trait` in traits, and for now is disallowed
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2023-06-23 22:00:08 -05:00
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0053`.
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