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 due to this
8 | ----- found signature defined here
10 = note: expected generator signature `fn((bool,)) -> _`
11 found generator signature `fn(bool) -> _`
13 error: aborting due to previous error
15 For more information about this error, try `rustc --explain E0631`.