1 error[E0631]: type mismatch in generator arguments
2 --> $DIR/issue-88653.rs:8:22
4 LL | fn foo(bar: bool) -> impl Generator<(bool,)> {
5 | ^^^^^^^^^^^^^^^^^^^^^^^ expected signature of `fn((bool,)) -> _`
8 | ----- found signature of `fn(bool) -> _`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0631`.