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error[E0277]: the trait bound `U: std::cmp::Eq` is not satisfied
--> $DIR/specialization-wfcheck.rs:7:17
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LL | trait Foo<'a, T: Eq + 'a> { }
| -- required by this bound in `Foo`
LL |
LL | default impl<U> Foo<'static, U> for () {}
| ^^^^^^^^^^^^^^^ the trait `std::cmp::Eq` is not implemented for `U`
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help: consider restricting type parameter `U`
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LL | default impl<U: std::cmp::Eq> Foo<'static, U> for () {}
| ^^^^^^^^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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