1 error[E0308]: mismatched types
2 --> $DIR/type-parameter-names.rs:5:5
4 LL | fn foo<Foo, Bar>(x: Foo) -> Bar {
5 | --- --- --- expected `Bar` because of return type
7 | | expected type parameter
10 | ^ expected type parameter `Bar`, found type parameter `Foo`
12 = note: expected type parameter `Bar`
13 found type parameter `Foo`
14 = note: a type parameter was expected, but a different one was found; you might be missing a type parameter or trait bound
15 = note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
17 error: aborting due to previous error
19 For more information about this error, try `rustc --explain E0308`.