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error[E0308]: mismatched types
--> $DIR/in-assoc-type.rs:20:22
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LL | type Bar = impl std::fmt::Debug;
| -------------------- the expected opaque type
...
LL | fn foo(&self) -> <Self as Foo<()>>::Bar {}
| --- ^^^^^^^^^^^^^^^^^^^^^^ expected opaque type, found `()`
| |
| implicitly returns `()` as its body has no tail or `return` expression
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= note: expected opaque type `<() as Foo<()>>::Bar`
found unit type `()`
note: this item must have the opaque type in its signature in order to be able to register hidden types
--> $DIR/in-assoc-type.rs:20:8
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LL | fn foo(&self) -> <Self as Foo<()>>::Bar {}
| ^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0308`.
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