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