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error[E0119]: conflicting implementations of trait `std::ops::Deref` for type `&_`:
--> $DIR/issue-28981.rs:5:1
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LL | impl<Foo> Deref for Foo { }
| ^^^^^^^^^^^^^^^^^^^^^^^
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= note: conflicting implementation in crate `core`:
- impl<T> std::ops::Deref for &T
where T: ?Sized;
error[E0210]: type parameter `Foo` must be used as the type parameter for some local type (e.g., `MyStruct<Foo>`)
--> $DIR/issue-28981.rs:5:6
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LL | impl<Foo> Deref for Foo { }
| ^^^ type parameter `Foo` must be used as the type parameter for some local type
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= note: only traits defined in the current crate can be implemented for a type parameter
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0119, E0210.
For more information about an error, try `rustc --explain E0119`.
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