mirror of https://github.com/rust-lang/rust
49 lines
1.5 KiB
Plaintext
49 lines
1.5 KiB
Plaintext
error[E0403]: the name `T` is already used for a generic parameter in this item's generic parameters
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--> $DIR/issue-86756.rs:1:14
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LL | trait Foo<T, T = T> {}
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| - ^ already used
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| |
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| first use of `T`
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error[E0412]: cannot find type `dyn` in this scope
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--> $DIR/issue-86756.rs:5:10
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LL | eq::<dyn, Foo>
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| ^^^ not found in this scope
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warning: trait objects without an explicit `dyn` are deprecated
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--> $DIR/issue-86756.rs:5:15
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LL | eq::<dyn, Foo>
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| ^^^
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= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
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= note: `#[warn(bare_trait_objects)]` on by default
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help: if this is an object-safe trait, use `dyn`
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LL | eq::<dyn, dyn Foo>
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| +++
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error[E0107]: missing generics for trait `Foo`
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--> $DIR/issue-86756.rs:5:15
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LL | eq::<dyn, Foo>
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| ^^^ expected at least 1 generic argument
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note: trait defined here, with at least 1 generic parameter: `T`
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--> $DIR/issue-86756.rs:1:7
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LL | trait Foo<T, T = T> {}
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| ^^^ -
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help: add missing generic argument
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LL | eq::<dyn, Foo<T>>
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| +++
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error: aborting due to 3 previous errors; 1 warning emitted
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Some errors have detailed explanations: E0107, E0403, E0412.
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For more information about an error, try `rustc --explain E0107`.
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