1 error[E0308]: mismatched types
2 --> $DIR/pat-type-err-formal-param.rs:8:8
4 LL | fn foo(Tuple(_): String) {}
5 | ^^^^^^^^ ------ expected due to this
7 | expected struct `String`, found struct `Tuple`
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0308`.