1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
error[E0053]: method `bar` has an incompatible type for trait
--> $DIR/specialization-broken.rs:15:22
|
LL | default impl<U> Foo for U
| - found this type parameter
...
LL | fn bar(&self) -> U {
| ^ expected associated type, found type parameter `U`
|
note: type in trait
--> $DIR/specialization-broken.rs:8:22
|
LL | fn bar(&self) -> impl Sized;
| ^^^^^^^^^^
= note: expected signature `fn(&_) -> impl Sized`
found signature `fn(&_) -> U`
help: change the output type to match the trait
|
LL - fn bar(&self) -> U {
LL + fn bar(&self) -> impl Sized {
|
error: method with return-position `impl Trait` in trait cannot be specialized
--> $DIR/specialization-broken.rs:15:5
|
LL | fn bar(&self) -> U {
| ^^^^^^^^^^^^^^^^^^
|
= note: specialization behaves in inconsistent and surprising ways with return position `impl Trait` in traits, and for now is disallowed
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0053`.
|
