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error[E0792]: expected generic type parameter, found `impl Foo`
--> $DIR/double-wrap-with-defining-use.rs:7:26
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LL | fn a(x: impl Foo) -> impl Foo {
| -------- this generic parameter must be used with a generic type parameter
LL | if true { x } else { a(a(x)) }
| ^^^^^^^
error: type parameter `impl Foo` is part of concrete type but not used in parameter list for the `impl Trait` type alias
--> $DIR/double-wrap-with-defining-use.rs:7:26
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LL | if true { x } else { a(a(x)) }
| ^^^^^^^
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0792`.
|
