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error[E0271]: type mismatch resolving `<impl Bar as Foo>::Item == i32`
--> $DIR/impl-trait-return-missing-constraint.rs:25:13
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LL | fn bar() -> impl Bar {
| -------- the expected opaque type
...
LL | fn baz() -> impl Bar<Item = i32> {
| ^^^^^^^^^^^^^^^^^^^^ expected associated type, found `i32`
LL |
LL | bar()
| ----- return type was inferred to be `impl Bar` here
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= note: expected associated type `<impl Bar as Foo>::Item`
found type `i32`
= help: consider constraining the associated type `<impl Bar as Foo>::Item` to `i32` or calling a method that returns `<impl Bar as Foo>::Item`
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
help: consider constraining the associated type `<impl Bar as Foo>::Item` to `i32`
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LL | fn bar() -> impl Bar<Item = i32> {
| ++++++++++++
error: aborting due to previous error
For more information about this error, try `rustc --explain E0271`.
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