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error[E0046]: not all trait items implemented, missing: `foo`
--> $DIR/unsized-trait-impl-trait-arg.rs:8:1
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LL | fn foo(&self, z: Z);
| -------------------- `foo` from trait
...
LL | impl<X: ?Sized> T2<X> for S4<X> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `foo` in implementation
error[E0277]: the size for values of type `X` cannot be known at compilation time
--> $DIR/unsized-trait-impl-trait-arg.rs:8:17
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LL | impl<X: ?Sized> T2<X> for S4<X> {
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `Sized`
|
note: required by an implicit `Sized` bound in `T2`
--> $DIR/unsized-trait-impl-trait-arg.rs:4:10
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LL | trait T2<Z> {
| ^ required by the implicit `Sized` requirement on this type parameter in `T2`
help: consider removing the `?Sized` bound to make the type parameter `Sized`
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LL - impl<X: ?Sized> T2<X> for S4<X> {
LL + impl<X> T2<X> for S4<X> {
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help: consider relaxing the implicit `Sized` restriction
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LL | trait T2<Z: ?Sized> {
| ++++++++
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0046, E0277.
For more information about an error, try `rustc --explain E0046`.
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