1 error[E0061]: this function takes 2 arguments but 1 argument was supplied
2 --> $DIR/issue-18819.rs:16:5
5 | ^^^^^^^--- an argument of type `&str` is missing
7 note: expected reference, found struct `X`
8 --> $DIR/issue-18819.rs:16:13
12 = note: expected reference `&dyn Foo<Item = bool>`
14 note: function defined here
15 --> $DIR/issue-18819.rs:11:4
17 LL | fn print_x(_: &dyn Foo<Item=bool>, extra: &str) {
18 | ^^^^^^^ ---------------------- -----------
19 help: consider borrowing here
23 help: provide the argument
25 LL | print_x(/* &dyn Foo<Item = bool> */, /* &str */);
26 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
28 error: aborting due to previous error
30 For more information about this error, try `rustc --explain E0061`.